September weather forecastFinley, CA
September
Weather in September
September, the first month of the autumn in Finley, is still a warm month, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 84.9°F (29.4°C).Temperature
September brings an average high-temperature of a warm 84.9°F (29.4°C), nearly identical to the preceding month. Finley experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to a cool 54°F (12.2°C).Heat index
September's average heat index is calculated to be a hot 86°F (30°C). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.Know that the heat index computations account for shaded terrains and slight winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
The average relative humidity in September is 49%.Rainfall
In September, the rain falls for 2.4 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. In Finley, California, during the entire year, the rain falls for 88.1 days and collects up to 20.28" (515mm) of precipitation.Snowfall
In Finley, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:55 pm PDT.
Sunshine
In September, the average sunshine is 11h.UV index
In Finley, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Finley, CA
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in September: 54°F
The months with the highest average low temperature are July and August (56.7°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in September
Finley, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in September
Finley, CA
- Average wind speed in September: 4.4mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).
Average humidity in September
Finley, CA
- Average humidity in September: 49%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (48%).
Average rainfall in September
Finley, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (3.94").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Finley, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (15.2 days).
The month with the least rainy days is July (1.1 days).
Average snowfall in September
Finley, CA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Finley, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Finley, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Finley, CA
- Average sunshine days in September: 27.2 days
The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (14.3 days).
Average UV index in September
Finley, CA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in September
Finley, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in September
Finley, CA
- Average visibility in September: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).
