September weather forecastFairmont, CA
September
Weather in September
September, the first month of the autumn in Fairmont, is also a moderately hot month, with an average temperature fluctuating between 59°F (15°C) and 85.1°F (29.5°C).Temperature
During September, Fairmont records an average high-temperature of a moderately hot 85.1°F (29.5°C), marking a slight divergence from August's 90.1°F (32.3°C). Despite the hot September days, Fairmont's nights see an average temperature plunge to a mild 59°F (15°C).Humidity
In Fairmont, the average relative humidity in September is 38%.Rainfall
In September, the rain falls for 1.2 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. In Fairmont, during the entire year, the rain falls for 44.4 days and collects up to 6.61" (168mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In Fairmont, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:27 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:38 pm PDT.
Sunshine
In Fairmont, the average sunshine in September is 11h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the UV index of 5 transforms into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fairmont, CA
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is August (62.1°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in September
Fairmont, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Fairmont, CA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest months (with the lowest average wind speed) are August and September (5.3mph).
Average humidity in September
Fairmont, CA
- Average humidity in September: 38%
The months with the highest relative humidity are February and March (56%).
The month with the lowest relative humidity is August (35%).
Average rainfall in September
Fairmont, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (1.57").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Fairmont, CA
- Average rainfall days in September: 1.2 days
The month with the highest number of rainy days is March (7.3 days).
The months with the least rainy days are August and September (1.2 days).
Average snowfall in September
Fairmont, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.31").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Fairmont, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Fairmont, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The months with the least sunshine are January and February (Average sunshine: 6h and 48min).
Average sunshine days in September
Fairmont, CA
- Average sunshine days in September: 28 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in September
Fairmont, CA
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Fairmont, CA
- Average cloud cover in September: 5
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in September
Fairmont, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
