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
Weather in September
Temperature
The transition into September subtly indicates a reduction in the average high-temperature, down to a hot 88.7°F (31.5°C) from August's fiery hot 95°F (35°C). Exeter's average low-temperature of 60.6°F (15.9°C) in September reflects a considerable decline from the daytime peak.Humidity
In September, the average relative humidity in Exeter is 32%.Rainfall
In Exeter, in September, during 1.8 rainfall days, 0.12" (3mm) of precipitation is typically accumulated. In Exeter, during the entire year, the rain falls for 55.9 days and collects up to 11.65" (296mm) of precipitation.Daylight
In Exeter, the average length of the day in September is 12h and 23min.On the first day of September in Exeter, sunrise is at 6:28 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:40 pm PDT.
Sunshine
In Exeter, the average sunshine in September is 11.1h.UV index
In Exeter, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
How hot does it get in Exeter in September?
What is the average humidity in September in Exeter?
How many days does it rain in September in Exeter?
How many hours of daylight does Exeter have in September?
What time are sunrise and sunset in September in Exeter?
How many hours of sunshine does Exeter have in September?
How high is the UV index in September in Exeter?
Average temperature in September
Exeter, CA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is July (95.5°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is December (39.7°F).
Average pressure in September
Exeter, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Exeter, CA
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is June (4.6mph).
The calmest month (with the lowest average wind speed) is December (3.3mph).
Average humidity in September
Exeter, CA
- Average humidity in September: 32%
The month with the highest relative humidity is January (63%).
The month with the lowest relative humidity is August (29%).
Average rainfall in September
Exeter, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is March (2.32").
The driest months (with the least rainfall) are June, July and August (0.04").
Average rainfall days in September
Exeter, CA
- Average rainfall days in September: 1.8 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 days).
Average daylight in September /
Average sunshine in September
Exeter, 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 and July (Average sunshine: 12h and 12min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in September
Exeter, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is August (28.9 days).
The month with the least sunshine days is March (19.8 days).
Average UV index in September
Exeter, 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
Exeter, CA
- Average cloud cover in September: 4
The month with the most cloud cover is March (Cloud cover 22).
The months with the least cloud cover are July, August and September (Cloud cover 4).
Average visibility in September
Exeter, 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).
Exeter, California, USA
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