Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September is characterized by a mild reduction in the average high-temperature, from a torrid 98.2°F (36.8°C) in August to a hot 91.8°F (33.2°C). During September, Fresno notes a substantial drop from the daytime peak to an average minimum temperature of 63.3°F (17.4°C).Humidity
The average relative humidity in September is 31%.Rainfall
In Fresno, in September, it is raining for 2.4 days, with typically 0.16" (4mm) of accumulated precipitation. In Fresno, California, during the entire year, the rain falls for 59.3 days and collects up to 10.43" (265mm) of precipitation.Daylight
In September, the average length of the day in Fresno 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 6:54 am and sunset at 6:43 pm PDT.
Sunshine
In September, the average sunshine is 11.2h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Fresno have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Fresno, CA
- Average high temperature in September: 91.8°F
The warmest month (with the highest average high temperature) is July (99.7°F).
The month with the lowest average high temperature is December (56.1°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in September
Fresno, 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
Fresno, CA
- Average wind speed in September: 4.6mph
The windiest month (with the highest average wind speed) is June (5.8mph).
The calmest month (with the lowest average wind speed) is November (3.8mph).
Average humidity in September
Fresno, CA
- Average humidity in September: 31%
The month with the highest relative humidity is January (65%).
The month with the lowest relative humidity is July (28%).
Average rainfall in September
Fresno, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is March (2.01").
The driest months (with the least rainfall) are June and August (0.08").
Average rainfall days in September
Fresno, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (1.2 days).
Average daylight in September /
Average sunshine in September
Fresno, CA
- Average daylight in September: 12h and 2min
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 1min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in September
Fresno, CA
- Average sunshine days in September: 26.8 days
The month with the most sunshine days is August (28.2 days).
The month with the least sunshine days is March (19.5 days).
Average UV index in September
Fresno, 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, November and December (UV index 3).
Average cloud cover in September
Fresno, CA
- Average cloud cover in September: 6
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
Fresno, 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).