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
In Hartford, entering September brings a subtle temperature decrement, reducing from August's moderately hot 77.5°F (25.3°C) to a pleasant 72.1°F (22.3°C). During the nights in September, the temperature in Hartford averages to a mild 56.5°F (13.6°C).Humidity
In Hartford, Michigan, the average relative humidity in September is 78%.Rainfall
In September, in Hartford, the rain falls for 13.5 days. Throughout September, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 137.5 rainfall days, and 17.8" (452mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 7:10 am and sunset at 8:18 pm. On the last day of September, in Hartford, sunrise is at 7:41 am and sunset at 7:27 pm EDT.
Sunshine
In Hartford, the average sunshine in September is 8.4h.UV index
In Hartford, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Exercise prevention - Warding off sunburn is urged. Around midday, solar radiation is most harmful; hence, exposure should be limited. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Hartford?
What is the average humidity in September in Hartford?
How much does it rain in Hartford in September?
When it does not snow in Hartford?
Does it snow in Hartford in September?
What is the average length of the day in September in Hartford?
When is the sunrise / sunset in September in Hartford?
How many hours of sunshine does Hartford have in September?
What is the UV index intensity in September in Hartford?
Average temperature in September
Hartford, MI
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Hartford, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Hartford, MI
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Hartford, MI
- Average humidity in September: 78%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Hartford, MI
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is June (2.48").
The driest months (with the least rainfall) are February and December (0.87").
Average rainfall days in September
Hartford, MI
- Average rainfall days in September: 13.5 days
The months with the highest number of rainy days are May and July (15.8 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in September
Hartford, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hartford, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hartford, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Hartford, MI
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is March (14.7 days).
The month with the least sunshine days is January (10.2 days).
Average UV index in September
Hartford, MI
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Hartford, MI
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Hartford, MI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Hartford, Michigan, USA
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