Weather in October
Temperature
Onset of October witnesses a reduction in the average high-temperature, falling from a refreshing 61.5°F (16.4°C) in September to a chilly 47.8°F (8.8°C). Throughout October, Yellowstone National Park braces for a considerable drop from daytime highs, with an average low-temperature of 23.7°F (-4.6°C).Rainfall
The month with the least rainfall is October, when the rain falls for 8.8 days and typically collects 1.18" (30mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In October, it is snowing for 5.8 days. Throughout October, 9.92" (252mm) of snow is accumulated. Throughout the year, there are 91.4 snowfall days, and 193.7" (4920mm) of snow is accumulated.Daylight
In October, the average length of the day is 10h and 58min.On the first day of the month, sunrise is at 7:21 am and sunset at 7:02 pm. On the last day of October, sunrise is at 7:59 am and sunset at 6:12 pm MDT.
Sunshine
In Yellowstone National Park, the average sunshine in October is 7h.UV index
In Yellowstone National Park, the average daily maximum UV index in October is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 during October translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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Average temperature in October
Yellowstone National Park, WY
- Average high temperature in October: 47.8°F
The warmest month (with the highest average high temperature) is July (71.6°F).
The month with the lowest average high temperature is December (24.3°F).
- Average low temperature in October: 23.7°F
The month with the highest average low temperature is July (41.6°F).
The coldest months (with the lowest average low temperature) are January and February (1.2°F).
Average rainfall in October
Yellowstone National Park, WY
- Average rainfall in October: 1.2"
The wettest month (with the highest rainfall) is May (2.5").
The driest month (with the least rainfall) is October (1.2").
Average rainfall days in October
Yellowstone National Park, WY
- Average rainfall days in October: 8.8 days
The month with the highest number of rainy days is January (16.8 days).
The month with the least rainy days is October (8.8 days).
Average snowfall in October
Yellowstone National Park, WY
- Average snowfall in October: 9.9"
The month with the highest snowfall is January (34.3").
The months with the least snowfall are July and August (0").
Average snowfall days in October
Yellowstone National Park, WY
- Average snowfall days in October: 5.8 days
The month with the highest number of snowfall days is January (16.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in October /
Average sunshine in October
Yellowstone National Park, WY
- Average daylight in October: 11h and 0min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in October: 7h
The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 4h).
Average UV index in October
Yellowstone National Park, WY
- Average UV index in October: 4
The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 1).
Yellowstone National Park, Wyoming, USA
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