Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September involves a subtle temperature drop, shifting from a moderately hot 76.6°F (24.8°C) in August to a pleasant 71.1°F (21.7°C). Throughout September, an average low-temperature of 52.5°F (11.4°C) is expected in Waltham.Humidity
The average relative humidity in September is 78%.Rainfall
In Waltham, during September, the rain falls for 11.2 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Waltham, during the entire year, the rain falls for 125.5 days and collects up to 23.66" (601mm) of precipitation.Snowfall
In Waltham, snow does not fall in June through September.Daylight
In Waltham, the average length of the day in September is 12h and 29min.On the first day of September in Waltham, sunrise is at 6:35 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Waltham?
What is the average humidity in September in Waltham?
How many days does it rain in September in Waltham?
When it does not snow in Waltham?
Does it snow in Waltham in September?
What is the average length of the day in September in Waltham?
When is the sunrise / sunset in September in Waltham?
How long on average sun shines in September in Waltham?
What is the UV index intensity in September in Waltham?
Average temperature in September
Waltham, MN
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in September
Waltham, MN
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Waltham, MN
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in September
Waltham, MN
- Average humidity in September: 78%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Waltham, MN
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is June (4.06").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Waltham, MN
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Waltham, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.26").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Waltham, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Waltham, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Waltham, MN
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in September
Waltham, 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
Waltham, MN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Waltham, MN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Waltham, Minnesota, USA
Weather forecast for your location
2. Allow the app to use your location