September weather forecastForest Lake, MN
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Forest Lake, Minnesota, with an average temperature ranging between min 51.8°F (11°C) and max 70.2°F (21.2°C).Temperature
In Forest Lake, the average high-temperature in September gently drops from a warm 77.2°F (25.1°C) in August to an agreeable 70.2°F (21.2°C). Forest Lake usually reports an average low-temperature of 51.8°F (11°C) during the month of September.Humidity
The average relative humidity in September is 77%.Rainfall
In Forest Lake, during September, the rain falls for 12 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Forest Lake, during the entire year, the rain falls for 120.2 days and collects up to 21.46" (545mm) of precipitation.Snowfall
In Forest Lake, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 6:34 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Forest Lake, MN
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in September: 51.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
Forest Lake, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Forest Lake, MN
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Forest Lake, MN
- Average humidity in September: 77%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Forest Lake, MN
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Forest Lake, MN
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is January (2.3 days).
Average snowfall in September
Forest Lake, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Forest Lake, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Forest Lake, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Forest Lake, MN
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is December (17.1 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Forest Lake, MN
- 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 January, February, November and December (UV index 1).
Average cloud cover in September
Forest Lake, MN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Forest Lake, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
