September weather forecast
Keene, CA

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Weather in September

September, the first month of the autumn in Keene, is also a moderately hot month, with an average temperature fluctuating between 82.4°F (28°C) and 57.9°F (14.4°C).

Temperature

The onset of September is marked by a minor decrease in temperature, transitioning from a tropical 88.2°F (31.2°C) in August to a moderately hot 82.4°F (28°C). Keene in September observes a substantial swing from the daily highs, with average nighttime temperatures of 57.9°F (14.4°C).

Humidity

The average relative humidity in September is 32%.

Rainfall

September is the month with the least rainfall. Rain falls for 1.6 days and accumulates 0.12" (3mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

In Keene, the average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:27 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:38 pm PDT.

Sunshine

The average sunshine in September in Keene is 10.9h.

UV index

The average daily maximum UV index in September in Keene is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 5 in September translates into these instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

How hot is September in Keene?

In Keene, in September, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 57.9°F (14.4°C).

What is the average humidity in September in Keene?

The average relative humidity in September in Keene is 32%.

What is the driest month in Keene?

The month with the least rainfall in Keene, California, is September, when the rain falls for 1.6 days and typically collects 0.12" (3mm) of precipitation.

How much does it rain in Keene in September?

In Keene, during September, the rain falls for 1.6 days and regularly aggregates up to 0.12" (3mm) of precipitation.

When it does not snow in Keene?

In Keene, snow does not fall in June through October.

What is the average length of the day in September in Keene?

In Keene, the average day length in September is 12h and 23min.

What time are sunrise and sunset in September in Keene?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 7:20 pm. On the last day of the month, in Keene, California, sunrise is at 6:48 am and sunset at 6:38 pm PDT.

How long on average sun shines in September in Keene?

In Keene, the average sunshine duration in September is 10.9h.

How high is the UV index in September in Keene?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Keene, CA

Average temperature in September - Keene, CA
  • Average high temperature in September: 82.4°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is December (50.5°F).

  • Average low temperature in September: 57.9°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (34°F).

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Average pressure in September
Keene, CA

Average pressure in September - Keene, CA
  • Average pressure in September: 29.89"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

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Average wind speed in September
Keene, CA

Average wind speed in September - Keene, CA
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is May (9.4mph).
The calmest month (with the lowest average wind speed) is September (7mph).

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Average humidity in September
Keene, CA

Average humidity in September - Keene, CA
  • Average humidity in September: 32%

The months with the highest relative humidity are February and December (58%).
The month with the lowest relative humidity is August (28%).

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Average rainfall in September
Keene, CA

Average rainfall in September - Keene, CA
  • Average rainfall in September: 0.12"

The wettest month (with the highest rainfall) is December (1.5").
The driest month (with the least rainfall) is September (0.12").

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Average rainfall days in September
Keene, CA

Average rainfall days in September - Keene, CA
  • Average rainfall days in September: 1.6 days

The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is September (1.6 days).

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Average snowfall in September
Keene, CA

Average snowfall in September - Keene, CA
  • Average snowfall in September: 0"

The month with the highest snowfall is December (5.16").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Keene, CA

Average snowfall days in September - Keene, CA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Keene, CA

Average daylight in September / Average sunshine in September - Keene, CA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 10h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 6h and 30min).

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Average sunshine days in September
Keene, CA

Average sunshine days in September - Keene, CA
  • Average sunshine days in September: 27.8 days

The month with the most sunshine days is October (28 days).
The month with the least sunshine days is February (20.4 days).

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Average UV index in September
Keene, CA

Average UV index in September - Keene, CA
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in September
Keene, CA

Average cloud cover in September - Keene, CA
  • Average cloud cover in September: 6

The month with the most cloud cover is March (Cloud cover 29).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in September
Keene, CA

Average visibility in September - Keene, 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).

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Keene, California, USA

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