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 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
The onset of September brings with it an average high-temperature of a still moderately hot 81.1°F (27.3°C), showing a negligible variation from the month before. An average low-temperature of 59.7°F (15.4°C) is observed during September nights.Heat index
For most parts of September, the heat index is evaluated at 82.4°F (28°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.In reference to the heat index, it's for places in shade and with a slight wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. 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
In Keith, the average relative humidity in September is 49%.Rainfall
In Keith, during September, the rain falls for 2.4 days and regularly aggregates up to 0.16" (4mm) of precipitation. In Keith, during the entire year, the rain falls for 52.1 days and collects up to 9.02" (229mm) of precipitation.Snowfall
In Keith, snow does not fall in January, February, April through December.Daylight
In Keith, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:21 pm. On the last day of September, in Keith, sunrise is at 6:50 am and sunset at 6:40 pm PDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In Keith, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 5 transforms into the following advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
What are September temperatures in Keith?
What is the average humidity in September in Keith?
How many days does it rain in September in Keith?
When it does not snow in Keith?
How many hours of daylight does Keith have in September?
When are sunrise and sunset in September in Keith?
How long on average sun shines in September in Keith?
What is the UV index intensity in September in Keith?
Average temperature in September
Keith, CA
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is August (84.2°F).
The month with the lowest average high temperature is December (59.2°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is February (43.3°F).
Average pressure in September
Keith, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Keith, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is December (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Keith, CA
- Average humidity in September: 49%
The month with the highest relative humidity is March (60%).
The months with the lowest relative humidity are October and November (47%).
Average rainfall in September
Keith, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (1.85").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Keith, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (8.3 days).
The months with the least rainy days are June and August (1.2 days).
Average snowfall days in September
Keith, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (0.1 days).
The months with the least snowfall days are January, February, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Keith, CA
- Average daylight in September: 12h and 2min
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: 10h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Keith, CA
- Average sunshine days in September: 26.1 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is February (21 days).
Average UV index in September
Keith, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Keith, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Keith, 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).
Keith, California, USA
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