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
Prospect Heights's transition into September involves a gentle shift in temperature, receding from a warm 79.7°F (26.5°C) in August to a pleasant 73.2°F (22.9°C). Throughout September, Prospect Heights notes a dramatic plunge from the daily high to an average low-temperature of 48.2°F (9°C).Humidity
In September, the average relative humidity is 47%.Rainfall
In Prospect Heights, in September, it is raining for 10.1 days, with typically 0.79" (20mm) of accumulated precipitation. In Prospect Heights, during the entire year, the rain falls for 108.6 days and collects up to 10.83" (275mm) of precipitation.Snowfall
In Prospect Heights, Colorado, snow does not fall in June through September.Daylight
In September, the average length of the day in Prospect Heights is 12h and 25min.On the first day of September in Prospect Heights, sunrise is at 6:31 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm MDT.
Sunshine
In September, the average sunshine is 11.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Prospect Heights?
What is the average humidity in September in Prospect Heights?
How much does it rain in Prospect Heights in September?
When it does not snow in Prospect Heights?
Does it snow in Prospect Heights in September?
How many hours of daylight does Prospect Heights have in September?
What time are sunrise and sunset in September in Prospect Heights?
How many hours of sunshine does Prospect Heights have in September?
What is the UV index intensity in September in Prospect Heights?
Average temperature in September
Prospect Heights, CO
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 48.2°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in September
Prospect Heights, CO
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is April (29.91"Hg).
Average wind speed in September
Prospect Heights, CO
- Average wind speed in September: 6mph
The windiest months (with the highest average wind speed) are January, February and March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Prospect Heights, CO
- Average humidity in September: 47%
The months with the highest relative humidity are January and February (69%).
The month with the lowest relative humidity is June (40%).
Average rainfall in September
Prospect Heights, CO
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is July (2.2").
The driest months (with the least rainfall) are January and November (0.31").
Average rainfall days in September
Prospect Heights, CO
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Prospect Heights, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Prospect Heights, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Prospect Heights, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 7h and 0min).
Average sunshine days in September
Prospect Heights, CO
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (24.7 days).
The month with the least sunshine days is July (4.7 days).
Average UV index in September
Prospect Heights, CO
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Prospect Heights, CO
- Average cloud cover in September: 14
The months with the most cloud cover are February and April (Cloud cover 23).
The months with the least cloud cover are June, September, October and November (Cloud cover 14).
Average visibility in September
Prospect Heights, CO
- 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).
Prospect Heights, Colorado, USA
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