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 arrival of September suggests a slight decrease in the average high-temperature, moving from an agreeable 71.1°F (21.7°C) in August to an enjoyable 64.9°F (18.3°C). Black Hawk's temperature in September declines substantially from daytime highs, settling at a consistent average of 41°F (5°C) during the nights.Humidity
The average relative humidity in September is 52%.Rainfall
In Black Hawk, Colorado, in September, it is raining for 9.4 days, with typically 0.55" (14mm) of accumulated precipitation. Throughout the year, in Black Hawk, there are 96 rainfall days, and 10.08" (256mm) of precipitation is accumulated.Snowfall
January through December are months with snowfall in Black Hawk. In Black Hawk, in September, during 1.5 snowfall days, 0.39" (10mm) of snow is typically accumulated. In Black Hawk, during the entire year, snow falls for 74.9 days and aggregates up to 35.39" (899mm) of snow.Daylight
In September, the average length of the day in Black Hawk is 12h and 26min.On the first day of September, sunrise is at 6:30 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm MDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
In Black Hawk, Colorado, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Black Hawk?
What is the average humidity in September in Black Hawk?
How much does it rain in Black Hawk in September?
How many days does it snow in September in Black Hawk?
What is the average length of the day in September in Black Hawk?
When are sunrise and sunset in September in Black Hawk?
How many hours of sunshine does Black Hawk have in September?
What is the UV index intensity in September in Black Hawk?
Average temperature in September
Black Hawk, CO
- Average high temperature in September: 64.9°F
The warmest month (with the highest average high temperature) is July (72.3°F).
The month with the lowest average high temperature is December (29.3°F).
- Average low temperature in September: 41°F
The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is February (11.3°F).
Average pressure in September
Black Hawk, CO
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is April (29.92"Hg).
Average wind speed in September
Black Hawk, CO
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Black Hawk, CO
- Average humidity in September: 52%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is June (50%).
Average rainfall in September
Black Hawk, CO
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is July (1.65").
The driest month (with the least rainfall) is December (0.28").
Average rainfall days in September
Black Hawk, CO
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (2.2 days).
Average snowfall in September
Black Hawk, CO
- Average snowfall in September: 0.39"
The month with the highest snowfall is March (6.73").
The months with the least snowfall are July and August (0.04").
Average snowfall days in September
Black Hawk, CO
- Average snowfall days in September: 1.5 days
The month with the highest number of snowfall days is March (11.6 days).
The months with the least snowfall days are July and August (0.1 days).
Average daylight in September /
Average sunshine in September
Black Hawk, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in September
Black Hawk, CO
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Black Hawk, CO
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Black Hawk, CO
- Average cloud cover in September: 21
The months with the most cloud cover are February, April and May (Cloud cover 35).
The month with the least cloud cover is June (Cloud cover 20).
Average visibility in September
Black Hawk, 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).
Black Hawk, Colorado, USA
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