September weather forecastCrystal Lakes, OH
September
Weather in September
September, the first month of the autumn in Crystal Lakes, is still a warm month, with an average temperature varying between 74.7°F (23.7°C) and 56.7°F (13.7°C).Temperature
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still warm 74.7°F (23.7°C) from August's 79.5°F (26.4°C). In September, Crystal Lakes experiences an average nighttime temperature of 56.7°F (13.7°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Crystal Lakes, Ohio, during September, the rain falls for 11.2 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 131.9 rainfall days, and 14.45" (367mm) of precipitation is accumulated.Snowfall
In Crystal Lakes, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 7:04 am and sunset at 8:07 pm. On the last day of September, in Crystal Lakes, sunrise is at 7:32 am and sunset at 7:19 pm EDT.
Sunshine
In September, the average sunshine is 8h.UV index
In Crystal Lakes, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. It's recommended to limit sun exposure when its radiation is at its peak during midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Crystal Lakes, OH
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in September
Crystal Lakes, OH
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Crystal Lakes, OH
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Crystal Lakes, OH
- Average humidity in September: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Crystal Lakes, OH
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is May (1.97").
The driest months (with the least rainfall) are January and November (0.79").
Average rainfall days in September
Crystal Lakes, OH
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Crystal Lakes, OH
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Crystal Lakes, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.5 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 Lakes, OH
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Crystal Lakes, OH
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in September
Crystal Lakes, OH
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Crystal Lakes, OH
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Crystal Lakes, OH
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
