September weather forecastCrystal, MI
September
Weather in September
September, the first month of the autumn in Crystal, is also an agreeable month, with an average temperature fluctuating between 52.3°F (11.3°C) and 71.1°F (21.7°C).Temperature
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a warm 77.4°F (25.2°C) to a pleasant 71.1°F (21.7°C). During the month of September, Crystal's nighttime temperature lowers to an average of 52.3°F (11.3°C).Humidity
In Crystal, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 11 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. In Crystal, during the entire year, the rain falls for 137.5 days and collects up to 20.59" (523mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Crystal, Michigan, is 12h and 29min.On the first day of the month, sunrise is at 7:04 am and sunset at 8:14 pm. On the last day of September, in Crystal, sunrise is at 7:36 am and sunset at 7:22 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Crystal is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Crystal, MI
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (26.4°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Crystal, MI
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Crystal, MI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Crystal, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Crystal, MI
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is November (1.18").
Average rainfall days in September
Crystal, MI
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Crystal, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.84").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Crystal, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Crystal, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Crystal, MI
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in September
Crystal, MI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Crystal, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Crystal, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
