CanadaAverage weather for Rocky Mountains in September
It's cool in September in Rocky Mountains with an average temperature of 11°C. Temperatures this month range from a low of 8°C to a high of 15°C. At night, you can expect temperatures between -3°C and 4°C.
Start of September
The month of September starts in Rocky Mountains with cool temps, averaging around 14°C during the day and nights around 3°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid September
By mid-September, daytime temps drop to around 11°C, with nights around 1°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Rocky Mountains is around 10°C, while nighttime temps are about 0°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 120 mm of precipitation, spread over 16 days. Of the total precipitation, about 11 cm falls as snow in September. The wind speed is around 3 Bft, mostly coming from the Southwest.
Rocky Mountains in September |
New York | ||
|---|---|---|---|
 Average temperature |
11°C | 27°C | |
 Max. temperature |
15°C | 31°C | |
| Min. temperature |
8°C | -5°C | |
 Total precipitation |
120 mm | 57 mm | |
| Rainy days |
16 days | 9 days | |
 Total snowfall |
11 cm | 0 cm | |
| Snowy days |
5 days | 0 days | |
August
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Rocky Mountains?
Looking for sun? September isn’t a good month to be in Rocky Mountains. There’s too much chance of rain this month.
Temperature records
With 25°C in 2017, Rocky Mountains reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was -3°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of -19°C to a highest value of 11°C.
Check out the climate of Rocky Mountains for all months and discover the best travel time
Curious about the weather in other parts of Canada? Check out the climate and weather for spots like Vancouver, Toronto, Niagara Falls, or explore other destinations in Canada.
Daily Temperature in September in Rocky Mountains
This chart shows the average daily high and low temperatures in September for Rocky Mountains, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Weather experiences in September in Rocky Mountains
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September in the Rocky Mountains is dynamic! Warm, sunny day... more
Daily Precipitation in September in Rocky Mountains
The chart below shows the average daily precipitation in September for Rocky Mountains, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 16 days of precipitation in Rocky Mountains.
Daily Snowfall in September in Rocky Mountains
This chart shows the average daily snowfall in September in Rocky Mountains, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
Daily UV index in September in Rocky Mountains
This chart shows the average daily UV index in September in Rocky Mountains, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Rocky Mountains over the years
This chart shows the average temperature in September in Rocky Mountains, measured in degrees Celsius, over the past few years.
Total precipitation in September in Rocky Mountains over the years
This chart shows the average precipitation in September in Rocky Mountains, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in September in Rocky Mountains per year
This chart shows the average snowfall in September in Rocky Mountains, measured in centimeters, over the past few years.
Daily weather in September for Rocky Mountains
Click on any day in September to get detailed info about the usual weather on that day in Rocky Mountains. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Rocky Mountains
The weather in September in Rocky Mountains is rated 4 out of 5 stars by 1 visitor. Have you been to Rocky Mountains? Share your weather experience to help other visitors.
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September in the Rocky Mountains is dynamic! Warm, sunny days alternate with unexpected snowfall. Autumn leaves abound, accompanied by breathtaking snowy landscapes. The weather is changeable. Therefore, prepare with multiple layers of clothing.— This text is automatically translated to English
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Average weather in Rocky Mountains by month
Click on a month below to see detailed weather info for Rocky Mountains. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Rocky Mountains for all months at once
