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
September ushers in a minor alteration in Idaho Springs's climate, with the average high-temperature moving from August's pleasant 71.1°F (21.7°C) to an enjoyable 64.9°F (18.3°C). Idaho Springs's nighttime average of 41°F (5°C) during September reflects a substantial decrease from the daytime temperature.Humidity
In Idaho Springs, the average relative humidity in September is 52%.Rainfall
In September, the rain falls for 9.4 days. Throughout September, 0.55" (14mm) of precipitation is accumulated. Throughout the year, there are 96 rainfall days, and 10.08" (256mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In Idaho Springs, Colorado, in September, snow falls for 1.5 days, with typically accumulated 0.39" (10mm) of snow. In Idaho Springs, 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 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
The average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 3 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
How much does it snow in September?
How many hours of daylight does Idaho Springs have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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
Idaho Springs, 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).
Idaho Springs, Colorado, USA
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