Monthly weather forecast and climate
Boulder, WY

January, the same as December, in Boulder, Wyoming, is a freezing cold winter month, with average temperature varying between 25.2°F (-3.8°C) and -7.8°F (-22.1°C). With an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of -7.8°F (-22.1°C), January is the coldest month. Weather in January »
The last month of the winter, February, is another freezing cold month in Boulder, Wyoming, with average temperature varying between -4.4°F (-20.2°C) and 30.7°F (-0.7°C). In February, the average high-temperature is 30.7°F (-0.7°C), and the average low-temperature is -4.4°F (-20.2°C). Weather in February »

March, the first month of the spring, in Boulder, is a cold month, with average temperature fluctuating between 10.2°F (-12.1°C) and 39.4°F (4.1°C). In March, the average high-temperature is 39.4°F (4.1°C), and the average low-temperature is 10.2°F (-12.1°C). Weather in March »

April is a cool spring month in Boulder, Wyoming, with average temperature varying between 51.4°F (10.8°C) and 20.8°F (-6.2°C). The average high-temperature, is 51.4°F (10.8°C), while the average low-temperature is 20.8°F (-6.2°C). Weather in April »

The last month of the spring, May, is a comfortable month in Boulder, Wyoming, with average temperature fluctuating between 28.8°F (-1.8°C) and 62.2°F (16.8°C). In May, the average high-temperature is 62.2°F (16.8°C), and the average low-temperature is 28.8°F (-1.8°C). Weather in May »

June, the first month of the summer, in Boulder, is a pleasant month, with average temperature fluctuating between 36.7°F (2.6°C) and 72°F (22.2°C). In Boulder, in June, the average high-temperature is 72°F (22.2°C), and the average low-temperature is 36.7°F (2.6°C). Weather in June »

July in Boulder, Wyoming, is a warm summer month, with average temperature varying between 79.3°F (26.3°C) and 40.6°F (4.8°C). July is the warmest month, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 40.6°F (4.8°C). Weather in July »

August, the last month of the summer, in Boulder, is another warm month, with average temperature fluctuating between 78.4°F (25.8°C) and 39°F (3.9°C). In August, the average high-temperature is 78.4°F (25.8°C), and the average low-temperature is 39°F (3.9°C). Weather in August »

September, the first month of the autumn, in Boulder, is still a pleasant month, with average temperature fluctuating between 30.4°F (-0.9°C) and 68.5°F (20.3°C). The average high-temperature, is 68.5°F (20.3°C), while the average low-temperature is 30.4°F (-0.9°C). Weather in September »

October, the same as September, in Boulder, Wyoming, is a mild autumn month, with average temperature ranging between min. 20.1°F (-6.6°C) and max. 58.1°F (14.5°C). In Boulder, Wyoming, in October, the average high-temperature is 58.1°F (14.5°C), and the average low-temperature is 20.1°F (-6.6°C). Weather in October »

November, the last month of the autumn, in Boulder, is also a cold month, with temperature in the range of an average high of 39.4°F (4.1°C) and an average low of 8.1°F (-13.3°C). The average high-temperature, is 39.4°F (4.1°C), while the average low-temperature is 8.1°F (-13.3°C). Weather in November »

December, the first month of the winter, in Boulder, is still a freezing cold month, with average temperature fluctuating between 28.2°F (-2.1°C) and -5.3°F (-20.7°C). In December, the average high-temperature is 28.2°F (-2.1°C), and the average low-temperature is -5.3°F (-20.7°C). Weather in December »

What is the coldest month in Boulder?

With an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of -7.8°F (-22.1°C), January is the coldest month.

How much does it rain in Boulder?

During the entire year, Boulder aggregates up to 10.4" (263mm) of precipitation.

When are the longest days in Boulder?

June has the longest days of the year in Boulder, with an average of 15.3h of daylight.

What is the warmest month in Boulder?

July is the warmest month in Boulder, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 40.6°F (4.8°C).

What is the wettest month in Boulder?

The month with the most rainfall in Boulder is September when 1.5" (37.3mm) of precipitation is typically aggregated.

What is the driest month in Boulder?

The month with the least rainfall in Boulder, Wyoming, is December when 0.3" (8.1mm) of precipitation is typically aggregated.

What is the month with the shortest days in Boulder?

The month with the shortest days is December, with an average of 9.1h of daylight.
Average temperature - Boulder, WY
Average rainfall - Boulder, WY
Average daylight - Boulder, WY
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