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 snowfall in September
- Average snowfall 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
Weather in September
Temperature
With September's advent, Winters sees an average high-temperature of a still hot 88.3°F (31.3°C), subtly shifted from August's 92.7°F (33.7°C). Winters's average nighttime temperatures present a clear contrast to its daytime highs, measured at a moderate 58.1°F (14.5°C) in September.Heat index
The heat index value for September is appraised at a hot 89.6°F (32°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
Humidity
The least humid month in Winters, California, is September, with an average relative humidity of 46%.Rainfall
In Winters, in September, it is raining for 1.5 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, in Winters, California, there are 71.7 rainfall days, and 13.43" (341mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall in Winters.Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Winters, sunrise is at 6:37 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September in Winters is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be vigilant - Preventing sunburn is recommended. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
How hot is it in Winters in September?
What is the least humid month in Winters?
What is the average humidity in September in Winters?
How much does it rain in Winters in September?
When it does not snow in Winters?
What is the average length of the day in September in Winters?
What time are sunrise and sunset in September in Winters?
How long on average sun shines in September in Winters?
What is the UV index intensity in September in Winters?
Average temperature in September
Winters, CA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is December (54.3°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is August (58.3°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
Winters, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in September
Winters, CA
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest months (with the lowest average wind speed) are January and November (5mph).
Average humidity in September
Winters, CA
- Average humidity in September: 46%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is September (46%).
Average rainfall in September
Winters, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (2.68").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Winters, CA
- Average rainfall days in September: 1.5 days
The month with the highest number of rainy days is March (12.7 days).
The month with the least rainy days is July (0.8 days).
Average snowfall in September
Winters, CA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.1").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Winters, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Winters, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Winters, CA
- Average sunshine days in September: 28.3 days
The month with the most sunshine days is July (30.1 days).
The month with the least sunshine days is March (16.9 days).
Average UV index in September
Winters, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Winters, CA
- Average cloud cover in September: 9
The months with the most cloud cover are March and December (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in September
Winters, 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).
Winters, California, USA
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