September weather forecastClovis, CA
September
Weather in September
September marks the onset of fall, bringing with it a slight relief from the summer heat. Residents experience a fairly rapid drop in temperature, ushering in the cooler months. The decrease in daytime sunshine is compensated by modest cloud cover, contributing to mild weather. Despite the downward trend in temperatures, the days remain quite warm, calling for suitable fall attire. September also marks the end of the highest UV index period conforming to the changing season.Temperature
September marks a gentle change in average high-temperature, declining from August's very hot 97.9°F (36.6°C) to a tropical 91.4°F (33°C). With a significant temperature contrast, nighttime temperatures in Clovis hover around an average low of 63°F (17.2°C) in September.Humidity
In September, the average relative humidity is 31%.Rainfall
In September, the rain falls for 2.2 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. In Clovis, during the entire year, the rain falls for 58.2 days and collects up to 11.18" (284mm) of precipitation.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:43 pm PDT.
Sunshine
In Clovis, the average sunshine in September is 11.2h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clovis, CA
- Average high temperature in September: 91.4°F
The warmest month (with the highest average high temperature) is July (98.8°F).
The month with the lowest average high temperature is December (56.1°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in September
Clovis, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Clovis, CA
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is June (5.5mph).
The calmest month (with the lowest average wind speed) is November (3.7mph).
Average humidity in September
Clovis, CA
- Average humidity in September: 31%
The month with the highest relative humidity is January (65%).
The months with the lowest relative humidity are July and August (28%).
Average rainfall in September
Clovis, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is March (2.2").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days in September
Clovis, CA
- Average rainfall days in September: 2.2 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (1.3 days).
Average daylight in September /
Average sunshine in September
Clovis, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 12min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Clovis, CA
- Average sunshine days in September: 26.6 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is March (19.8 days).
Average UV index in September
Clovis, CA
- Average UV index in September: 6
The months with the highest UV index are June, 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
Clovis, CA
- Average cloud cover in September: 5
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in September
Clovis, 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).
