September weather forecastLowell, ID
September
Weather in September
September, the first month of the autumn in Lowell, is still a warm month, with an average temperature fluctuating between 47.3°F (8.5°C) and 73.4°F (23°C).Temperature
The arrival of September corresponds with a temperature reduction, down from August's 82.6°F (28.1°C) to a still moderately hot 73.4°F (23°C). A noticeable temperature swing characterizes Lowell's September nights, dipping to an average of 47.3°F (8.5°C).Humidity
In Lowell, the average relative humidity in September is 54%.Rainfall
In Lowell, Idaho, in September, during 7.8 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Lowell, during the entire year, the rain falls for 156.5 days and collects up to 21.38" (543mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Lowell, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:04 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:23 pm PDT.
Sunshine
In Lowell, the average sunshine in September is 10h.UV index
In Lowell, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 4 in September translates into these instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lowell, ID
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (34°F).
- Average low temperature in September: 47.3°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Lowell, ID
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed in September
Lowell, ID
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is March (4.4mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Lowell, ID
- Average humidity in September: 54%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (48%).
Average rainfall in September
Lowell, ID
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is March (2.56").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Lowell, ID
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in September
Lowell, ID
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lowell, ID
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lowell, 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: 10h and 0min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Lowell, ID
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is July (23.2 days).
The month with the least sunshine days is April (9.1 days).
Average UV index in September
Lowell, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Lowell, ID
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Lowell, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
