Monthly weather forecast and climate
Dayton, MT

January, like December, is another subzero cold winter month in Dayton, Montana, with average temperature fluctuating between 28.6°F (-1.9°C) and 16.2°F (-8.8°C). In January, the average high-temperature is practically the same as in December - a still freezing cold 28.6°F (-1.9°C). Weather in January »

February, the last month of the winter, in Dayton, is also a subzero cold month, with average temperature fluctuating between 16.3°F (-8.7°C) and 29.7°F (-1.3°C). In February, the average high-temperature is relatively the same as in January - a still subzero cold 29.7°F (-1.3°C). Weather in February »

March, the first month of the spring, in Dayton, is a wintry month, with average temperature varying between 38.3°F (3.5°C) and 23.4°F (-4.8°C). In March, the average high-temperature marginally rises, from a freezing cold 29.7°F (-1.3°C) in February, to a cold 38.3°F (3.5°C). Weather in March »

April is a chilly spring month in Dayton, Montana, with average temperature ranging between min 29.7°F (-1.3°C) and max 47.8°F (8.8°C). In April, the average high-temperature rises, from a cold 38.3°F (3.5°C) in March, to a chilly 47.8°F (8.8°C). Weather in April »

May, the last month of the spring, in Dayton, is an enjoyable month, with temperature in the range of an average low of 36.7°F (2.6°C) and an average high of 60.8°F (16°C). In May, the average high-temperature rises, from a chilly 47.8°F (8.8°C) in April, to an enjoyable 60.8°F (16°C). Weather in May »

June, the first month of the summer, in Dayton, is a pleasant month, with average temperature fluctuating between 68°F (20°C) and 42.8°F (6°C). In June, the average high-temperature marginally rises, from a comfortable 60.8°F (16°C) in May, to an agreeable 68°F (20°C). Weather in June »

July in Dayton, Montana, is a moderately hot summer month, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 48.4°F (9.1°C). July is the warmest month, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 48.4°F (9.1°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Dayton, Montana, with average temperature fluctuating between 48.2°F (9°C) and 78.4°F (25.8°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.4°F (25.8°C). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Dayton, Montana, with average temperature varying between 67.1°F (19.5°C) and 41.5°F (5.3°C). In Dayton, the average high-temperature drops, from a moderately hot 78.4°F (25.8°C) in August, to a comfortable 67.1°F (19.5°C). Weather in September »

October, like September, in Dayton, Montana, is another fresh autumn month, with temperature in the range of an average high of 50.4°F (10.2°C) and an average low of 32.7°F (0.4°C). In October, the average high-temperature plummets, from a comfortable 67.1°F (19.5°C) in September, to a fresh 50.4°F (10.2°C). Weather in October »

November, the last month of the autumn, in Dayton, is also a wintry month, with average temperature ranging between max 36°F (2.2°C) and min 24.1°F (-4.4°C). In November, the average high-temperature drops, from a fresh 50.4°F (10.2°C) in October, to a wintry 36°F (2.2°C). Weather in November »

December, the first month of the winter, in Dayton, is also a subzero cold month, with average temperature ranging between min 16.2°F (-8.8°C) and max 27.1°F (-2.7°C). The coldest month is December, with an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 16.2°F (-8.8°C). Weather in December »

What is the most humid month in Dayton?

The most humid month in Dayton, Montana, is January, with an average relative humidity of 93%.

How many days does it rain in Dayton?

In Dayton, Montana, during the entire year, the rain falls for 129.8 days and collects up to 16.42" (417mm) of precipitation.

When does it snow in Dayton?

January through June, September through December are months with snowfall.

How much does it snow in Dayton?

Throughout the year, in Dayton, Montana, there are 117.4 snowfall days, and 58.62" (1489mm) of snow is accumulated.

What is the month with the least sunshine in Dayton?

January has the least sunshine of the year in Dayton, Montana, with an average of 3.5h of sunshine.

What are the months with the lowest UV index in Dayton?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the rainiest month in Dayton?

June is the month with the most rainfall. Rain falls for 14.9 days and accumulates 1.89" (48mm) of precipitation.

When are the longest days in Dayton?

June has the longest days of the year, with an average of 16h of daylight.

What is the warmest month in Dayton?

July is the warmest month in Dayton, Montana, with an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 48.4°F (9.1°C).

What are the least humid months in Dayton?

July and August, with an average relative humidity of 52%, are the least humid months in Dayton.

What is the driest month in Dayton?

July is the month with the least rainfall in Dayton. Rain falls for 8 days and accumulates 0.59" (15mm) of precipitation.

When it does not snow in Dayton?

In Dayton, Montana, snow does not fall in July and August.

What month has the most sunshine in Dayton?

The month with the most sunshine in Dayton, Montana, is July, with an average of 11.7h of sunshine.

When is the highest UV index in Dayton?

July is the month with the highest UV index in Dayton, with an average maximum UV index of 6.

What is the coldest month in Dayton?

With an average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 16.2°F (-8.8°C), December is the coldest month.

What is the snowiest month in Dayton?

December is the month with the most snowfall in Dayton. Snow falls for 21.7 days and accumulates 12.36" (314mm) of snow.

What is the month with the shortest days in Dayton?

With an average of 8.5h of daylight, December has the shortest days of the year.
Average temperature - Dayton, MT
Average pressure - Dayton, MT

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.91").

Average wind speed - Dayton, MT

The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest months (with the lowest average wind speed) are August and December (3.6mph).

Average humidity - Dayton, MT
Average rainfall - Dayton, MT
Average rainfall days - Dayton, MT

The month with the highest number of rainy days is April (15.9 days).
The month with the least rainy days is December (6.5 days).

Average snowfall - Dayton, MT
Average snowfall days - Dayton, MT

The month with the highest number of snowfall days is January (22.3 days).
Months with the least snowfall days are July and August (0 days).

Average daylight / Average sunshine - Dayton, MT

The month with the longest days is June (Average daylight: 16h).
The month with the shortest days is December (Average daylight: 8.5h).

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 3.5h).

Average sunshine days - Dayton, MT
Average visibility - Dayton, MT