September weather forecastGreencreek, ID
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Greencreek, Idaho, with an average temperature ranging between max 72.7°F (22.6°C) and min 48.9°F (9.4°C).Temperature
A shift in Greencreek's weather is observed as August turns into September, with the average high temperature reducing from a moderately hot 82°F (27.8°C) to a pleasant 72.7°F (22.6°C). Greencreek registers a substantial downturn from daytime peaks throughout September nights, with an average low-temperature of 48.9°F (9.4°C).Humidity
In September, the average relative humidity is 51%.Rainfall
In September, in Greencreek, the rain falls for 9.8 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. In Greencreek, during the entire year, the rain falls for 133.5 days and collects up to 28.9" (734mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.47" (12mm) of snow. In Greencreek, during the entire year, snow falls for 112.2 days and aggregates up to 105.79" (2687mm) of snow.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:06 am and sunset at 7:22 pm. On the last day of September, in Greencreek, sunrise is at 6:43 am and sunset at 6:26 pm PDT.
Sunshine
In September, the average sunshine in Greencreek is 9.9h.UV index
The average daily maximum UV index in September in Greencreek is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greencreek, ID
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is August (54.7°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in September
Greencreek, ID
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in September
Greencreek, ID
- Average wind speed in September: 3.7mph
The windiest months (with the highest average wind speed) are January, February, March and November (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Greencreek, ID
- Average humidity in September: 51%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (44%).
Average rainfall in September
Greencreek, ID
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in September
Greencreek, ID
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is April (17.8 days).
The month with the least rainy days is January (6 days).
Average snowfall in September
Greencreek, ID
- Average snowfall in September: 0.47"
The month with the highest snowfall is February (23.11").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Greencreek, ID
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (19.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Greencreek, ID
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in September
Greencreek, ID
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is March (7.3 days).
Average UV index in September
Greencreek, ID
- 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 and December (UV index 1).
Average cloud cover in September
Greencreek, ID
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Greencreek, ID
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
