September weather forecastMettah, CA
September
Weather in September
The first month of the autumn, September, is still a warm month in Mettah, California, with an average temperature ranging between min 43.7°F (6.5°C) and max 76.8°F (24.9°C).Temperature
In September, the average high-temperature marginally drops from 83.3°F (28.5°C) in August to a still warm 76.8°F (24.9°C). Mettah in September observes a sharp transition from the daytime heat, falling to an average low of 43.7°F (6.5°C).Humidity
In Mettah, the average relative humidity in September is 63%.Rainfall
In Mettah, in September, it is raining for 4.5 days, with typically 0.91" (23mm) of accumulated precipitation. In Mettah, during the entire year, the rain falls for 127.2 days and collects up to 39.02" (991mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September in Mettah is 12h and 27min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:58 pm PDT.
Sunshine
In September, the average sunshine is 10.3h.UV index
In Mettah, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mettah, CA
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is August (83.3°F).
The month with the lowest average high temperature is December (47.1°F).
- Average low temperature in September: 43.7°F
The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in September
Mettah, CA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in September
Mettah, CA
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Mettah, CA
- Average humidity in September: 63%
The month with the highest relative humidity is March (84%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Mettah, CA
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is January (7.17").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Mettah, CA
- Average rainfall days in September: 4.5 days
The month with the highest number of rainy days is March (19.3 days).
The months with the least rainy days are July and August (2.3 days).
Average snowfall in September
Mettah, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Mettah, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Mettah, CA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 18min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Mettah, CA
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is March (10.3 days).
Average UV index in September
Mettah, CA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in September
Mettah, CA
- Average cloud cover in September: 20
The month with the most cloud cover is March (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Mettah, CA
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are March, April and December (4mi).
