Average weather for Belfair in September
It's pleasantly warm in September in Belfair with an average temperature of 21°C. Temperatures this month range from a low of 18°C to a high of 24°C. At night, you can expect temperatures between 7°C and 13°C.
Start of September
The month of September starts in Belfair with warm temps, averaging around 24°C during the day and nights around 12°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 22°C, with nights around 11°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Belfair is around 20°C, while nighttime temps are about 10°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
In September, there is an average of 146 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Belfair in September |
New York | ||
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21°C | 27°C | |
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24°C | 31°C | |
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18°C | -5°C | |
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146 mm | 57 mm | |
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8 days | 9 days |
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Belfair?
Looking for sun? September isn’t a good month to be in Belfair. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 33°C in 2020, Belfair reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 2°C to a highest value of 17°C.
Check out the climate of Belfair for all months and discover the best travel time
Daily Temperature in September in Belfair
This chart shows the average daily high and low temperatures in September for Belfair, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Belfair
The chart below shows the average daily precipitation in September for Belfair, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 8 days of precipitation in Belfair.
Daily UV index in September in Belfair
This chart shows the average daily UV index in September in Belfair, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Belfair over the years
This chart shows the average temperature in September in Belfair, measured in degrees Celsius, over the past few years.
Total precipitation in September in Belfair over the years
This chart shows the average precipitation in September in Belfair, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Belfair
Click on any day in September to get detailed info about the usual weather on that day in Belfair. Check out the historical temperatures and precipitation over the past 10 years on this day.






























Weather experiences in September in Belfair
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Average weather in Belfair by month
Click on a month below to see detailed weather info for Belfair. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.