September Weather in Hilo, Hawaii - 2024
Hilo, commonly known as "The Big Island", is the largest town in Hawaii County, and it is in the District of South Hilo. The town overlooks Hilo Bay at the base of two shield volcanoes, Mauna Loa, an active volcano, and Mauna Kea, a dormant volcano. The town is filled with islands, beaches, nightlife, and various attractions. The sight of humpback whales and views of the Mauka Summit should also be in your itinerary. The weather of the town is tropical all year-round and the snowbirds can have a memorable experience because of the recreational amenities offered by the town.
Generally, September in Hilo will be really nice, with an average temperature of around 86°F / 30°C. But due to the moderate humidity it can feel slightly uncomfortable for some. You can expect around 5 rainy days, with on average 0.8 inches / 20 mm of rain during the month of September.
Contents
- 1 September weather in Hilo Hawaii
- 2 September weather in Hilo Hawaii in more detail
- 3 What to do in Hilo Hawaii in September
- 4 Is it humid in Hilo Hawaii in September?
- 5 Is September a good time to go to Hilo Hawaii?
- 6 Does it rain all day in Hilo Hawaii in September?
- 7 Is September the rainiest month in Hilo Hawaii?
- 8 Is September the most sunniest month in Hilo Hawaii?
- 9 More information about Hilo Hawaii
- 10 Weather in Hilo Hawaii in other months
- 11 What to do in Hilo Hawaii for each month
September weather in Hilo Hawaii
To get a good overview of the type of weather you can expect in September in Hilo, we will look at the day and night temperature, minimum and maximum water temperature, and if September is comfortable or humidGenerally, September in Hilo will be really nice. Historical data shows that you can expect an average temperature of around 86°F / 30°C. But due to the moderate humidity it can feel slightly uncomfortable for some. During the night, it will cool down to around 73°F / 23°C. Many will prefer a location with air conditioning due to the night temperature, and the high humidity level.
Hilo has some rainy days in September. You can expect around 5 rainy days, with on average 0.8 inches / 20 mm of rain during the whole month.
September weather in Hilo Hawaii in more detail
To get a better feeling for the type of weather, you can expect in September in Hilo, we will look at the temperature, rain, wind, humidity, water temperature, and sun and clouds- What will the temperature be in Hilo in September
Generally, you can expect in September an average temperature of 86°F / 30°C during the day and an average of 73°F / 23°C during the night. In September, during the warmest part of the afternoon, the temperature can often get as high as 91°F / 33°C, and at the end of the night, it can get as low as 69°F / 21°C.
When looking at the whole year, January, February, March and December are the coldest months, with an average temperature of around 80°F / 27°C. July, August, September and October are the hottest months, with an average temperature of around 86°F / 30°C. When comparing September with the temperature in the month before and after, this is equal to August, which sees an average maximum temperature of around 86°F / 30°C. And equal to October, which sees an average maximum temperature of around 86°F / 30°C.
But average temperatures only tell half of the story. It is also good to check the maximum and minimum temperatures. When looking at the whole year, August, September and October are the hottest months, with a temperature of around 91°F / 33°C. February, March, April and December are the coldest months, with a temperature of around 86°F / 30°C. When comparing September with the temperature in the month before and after, this is equal to August, which sees an average maximum temperature of around 91°F / 33°C. And equal to October, which sees an average maximum temperature of around 91°F / 33°C.
In the following graph, you can see how many cold and hot days you can expect in Hilo each month:
- Can you expect rain in September in Hilo?
Generally, you can expect about 5 rain days in September, with on average 0.8 inches / 20 mm of rain.
When looking at the whole year, June is the dryest month, with an average rainfall of around 0.2 inches / 6 mmmm. March is the wettest month, with an average rainfall of around 3.8 inches / 97 mmmm. When comparing September with the month before and after, this is slightly more than August, which sees around 0.7 inches / 17 mm of rain. And a lot less than October, which sees around 1.3 inches / 32 mm of rain
If we look at the number of days with rain, June is the month with the least amount of rain days with an average of between 2 and 3 days. March is the month with the most rain days with around 9 days. When comparing September with the month before and after, this is almost equal to August, which sees around 4 days of rain. And almost equal to October, which sees around 6 days of rain
- What will the water temperature be in Hilo for September
You can expect in September, the water temperature for Hilo to be between 82°F / 28°C and 78°F / 26°C.
To compare the water temperature we will use the maximum water temperature. You can expect this temperature on a more sunny day, close to the shore, when the wind does not mix the relatively warmer and colder water.
September has the highest water temperature, with an average of between 80°F / 27°C and 82°F / 28°C. March has the lowest water temperature, with around 77°F / 25°C. When comparing the water temperature from September with the month before and after, September has a water temperature almost equal to August, with a water temperature of an average of between 80°F / 27°C and 82°F / 28°C. And almost equal to the water temperature from October, that is around 80°F / 27°C.
- Can you expect in September a lot of sunny days in Hilo
Generally, you can expect around 2 sunny days in September and around 26 partly sunny days. The remaining days will be cloudy.
When looking at the whole year, January is the month with the highest number of sunny days, with an average of between 3 and 4 sunny days. June is the month with the lowest number of sunny days, with an average of between 0 and 1 sunny days. When comparing September with the number of sunny days in the month before and after, it is almost equal to August, with an average of between 1 and 2 sunny days. And almost equal to October, with around 3 sunny days
We have looked at the sunny days in Hilo. Let's also look at the cloudy or overcast days. March is the month with the highest number of cloudy days, with around 8 cloudy days. August is the month with the lowest number of cloudy days, with an average of between 2 and 3 cloudy days. When comparing September with the number of cloudy days in the month before and after, it is almost equal to August, with an average of between 2 and 3 cloudy days. And almost equal to October, with an average of between 4 and 5 cloudy days
- Will it be comfortable in September in Hilo?
Generally, September in Hilo will be moderately humid, and can feel slightly uncomfortable for some.
We use the humidity and temperature in Hilo to calculate the Wintersun Expert Comfort level for each month. The lower the Wintersun Expert Comfort level, the more comfortable it will be. Only for certain people, extremely dry air can feel slightly uncomfortable.
When looking at the whole year, January has the lowest humidity, with a Wintersun Expert comfort level of "comfortable" (not very humid). July has the highest humidity, with a Wintersun Expert comfort level of "slightly uncomfortable" (moderately humid). When comparing September with the month before and after, this is almost equal to August, which has a Wintersun Comfort level of "slightly uncomfortable" (moderately humid). And almost equal to October, which has a Wintersun Comfort level of "slightly uncomfortable" (moderately humid)
What to do in Hilo Hawaii in September
Hilo is a popular tourist location. There are many places that you can visit:
- Rainbow Falls: The waterfalls are 80 feet tall and they fall over the lava cave which according to legend is known to be the home of the ancient Hawaiian goddess, Hina. If you want to see the mesmerizing rainbows the waterfalls are famous for, you should visit in the morning.
- Liliʻuokalani Park and Gardens: The only Japanese themed park and garden located outside Japan. The place is dominated by the Edo-styled Japanese gardens, a Japanese teahouse, Waihonu Pond, bridges, pagodas (ancient Japanese architecture), statues, and Torii. The place is perfect for picnicking and swimming.
- Hilo Bay Beachfront Park: Hilo Bay Beachfront Park is the longest beach on the Big Island. You can visit this place for beachcombing, canoeing, fishing, snorkeling as well as picnicking. You can also bask under the sun.
- Kaumana Caves: Explore the lava tube created in 1881 by the lava flow of Mauna Loa. The trail is good for hiking, walking, or a nature trip. The skylight cradles a miniature rainforest where ferns and philodendron drape down the sides of the cave.
- Pacific Tsunami Zoo: The museum is dedicated to the history of Pacific and Chilean Tsunami which devastated much of each coast of the Big Island. The museum also educates about the tsunamis along with the 2004 earthquake.
- Imiloa Astronomy Center: It is an astronomy and culture center. You can attend the exhibits and shows relating to Hawaiian culture and history as well as astronomy. The Center has 120-seat planetarium featuring a full-dome video projection system.
Is it humid in Hilo Hawaii in September?
A lot of people ask interested in the humidity or relative humidity for Hilo Hawaii in September. But the real question they want to ask is not about humidity but the amount of moisture in the air. Or better, about comfort. Will it be comfortable in September in Hilo, or will high humidity make it uncomfortable.To answer this question, we have to look at the dew point. Relative humidity can change a lot in Hilo during the day and night, as it changes when the amount of moisture changes and, but also when the temperature changes. It is a lot less reliable for comfort. Where the dew point only varies with the amount of moisture in the air.
Looking at the dew point, we can see that for the month of September, you can expect that Hilo will be moderately humid, and can feel slightly uncomfortable for some.
January is the month with the most comfort. It will not be very humid, and will feel comfortable. July is the most uncomfortable month. It will be moderately humid, and can feel slightly uncomfortable for some. In the graph, you can see that there is not a lot of difference between the most comfortable and most uncomfortable months.
Is September a good time to go to Hilo Hawaii?
Trying to answer the question of whether September is a good time to go to Hilo is not as easy as it first seems. Some people like colder weather, and others prefer a warmer climate. Some are fine with some humidity, and others are not. If your location has air conditioning, the night temperature is less important.
These are some examples. I will try to answer the question with a more generic person in mind. The more detailed information in this article should be enough to check further if this applies to you as well.
If we look at the average temperature for Hilo in September, we can see that it will be too hot for a lot of visitors. In September, you can expect it to be really nice, with an average temperature of around 86°F / 30°C. But due to the moderate humidity it can feel slightly uncomfortable for some. During the night, it will be around 73°F / 23°C.
As the number of overcast days is not high, you can enjoy the sun with around 2 sunny days and 26 partly sunny days.
The last aspect we will look at is rain. You can expect around 5 rainy days, with on average 0.8 inches / 20 mm of rain during September. If it were more than five days, the location would be slightly less attractive for a shorter stay.
We have looked at the average day temperature, the night temperature, humidity, the number of overcast days, and the rain. We think that September in Hilo Hawaii is not the most optimal destination. But that doesn't mean it is not a good time for you to go. As said before, each visitor has their own preferences when it comes to the weather.
Does it rain all day in Hilo Hawaii in September?
In Hilo, it does not rain all day in September. You can expect around 5 rainy days, with on average 0.8 inches / 20 mm of rain during the month.
Another way of looking at the rain is the number of sunny days. For Hilo Hawaii, there are, on average 2 sunny days and 26 partly sunny days in September. That clearly shows that it is not raining all the time.
Is September the rainiest month in Hilo Hawaii?
September is not the month with the most rainy days, and not the month with the most rain.
To answer what the rainiest month is in Hilo, we will both look at the month with the most rain, and the month with the highest number of rainy days.
March is the month with the the highest number of rainiest days. On average, you can expect 9 days with rain. June is the month with the lowest number of rainy days, with aproximately 3 days.
March is the month with the most rain. This is not equal as the one with the most rainy days. On average, you can expect 3.8 inches / 97 mm of rain. June is the month with the least amount of rain. This is not the same month as the one with the lowest number of rainy days. You can expect approximately 0.2 inches / 6 mm of rain.
Is September the most sunniest month in Hilo Hawaii?
September is not the month with the most sunny days, not the month with the most partly sunny days, and it is not the month with the lowest number of overcast days.
To answer what the sunniest month is in Hilo, we will of course look at the month with the most sunniest days, but also look at the month with the biggest number of days that are sunny or partly sunny.
January is the month with the highest number of sunny days. On average, you can expect 2 sunny days, and 26 partly suny days. June is the month with the lowest number of sunny days.
August is the month with the highest number of sunny days and partly sunny days combined. While February is the month with the lowest number of sunny days and partly sunny days combined.
The last thing we will look at is the number of overcast days. August is the month with the lowest number of overcast days. While March is the month with the highest number of overcast days.
More information about Hilo Hawaii
Weather in Hilo Hawaii in other months
- Weather in Hilo Hawaii for January
- Weather in Hilo Hawaii for February
- Weather in Hilo Hawaii for March
- Weather in Hilo Hawaii for April
- Weather in Hilo Hawaii for May
- Weather in Hilo Hawaii for June
- Weather in Hilo Hawaii for July
- Weather in Hilo Hawaii for August
- Weather in Hilo Hawaii for October
- Weather in Hilo Hawaii for November
- Weather in Hilo Hawaii for December
What to do in Hilo Hawaii for each month
- What to do in January in Hilo Hawaii
- What to do in February in Hilo Hawaii
- What to do in March in Hilo Hawaii
- What to do in April in Hilo Hawaii
- What to do in May in Hilo Hawaii
- What to do in June in Hilo Hawaii
- What to do in July in Hilo Hawaii
- What to do in August in Hilo Hawaii
- What to do in September in Hilo Hawaii
- What to do in October in Hilo Hawaii
- What to do in November in Hilo Hawaii
- What to do in December in Hilo Hawaii