Monthly weather forecast and climate
Saint Johns, MT

Weather in January

January, like December, is another subzero cold winter month in Saint Johns, Montana, with average temperature ranging between min 14.4°F (-9.8°C) and max 27.1°F (-2.7°C). The coldest months are January and December, with an average high-temperature of 27.1°F (-2.7°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Saint Johns, Montana, with average temperature fluctuating between 27.7°F (-2.4°C) and 13.5°F (-10.3°C). In February, the average high-temperature is relatively the same as in January - a still freezing cold 27.7°F (-2.4°C). Weather in February »

Weather in March

March, the first month of the spring, in Saint Johns, is a cold month, with temperature in the range of an average low of 24.6°F (-4.1°C) and an average high of 39.7°F (4.3°C). In Saint Johns, the average high-temperature in March increases, from a subzero cold 27.7°F (-2.4°C) in February, to a cold 39.7°F (4.3°C). Weather in March »

Weather in April

April in Saint Johns, Montana, is a fresh spring month, with temperature in the range of an average low of 36.3°F (2.4°C) and an average high of 53.2°F (11.8°C). In April, the average high-temperature increases, from a wintry 39.7°F (4.3°C) in March, to a cool 53.2°F (11.8°C). Weather in April »

Weather in May

The last month of the spring, May, is an enjoyable month in Saint Johns, Montana, with average temperature fluctuating between 64.6°F (18.1°C) and 46.2°F (7.9°C). In Saint Johns, the average high-temperature in May rises, from a fresh 53.2°F (11.8°C) in April, to an enjoyable 64.6°F (18.1°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Saint Johns, Montana, with average temperature varying between 73°F (22.8°C) and 53.1°F (11.7°C). In June, the average high-temperature marginally rises, from a comfortable 64.6°F (18.1°C) in May, to a pleasant 73°F (22.8°C). Weather in June »

Weather in July

July in Saint Johns, Montana, is a warm summer month, with average temperature ranging between min 60.4°F (15.8°C) and max 82.8°F (28.2°C). With an average high-temperature of 82.8°F (28.2°C) and an average low-temperature of 60.4°F (15.8°C), July is the warmest month. The average heat index is calculated to 82.6°F (28.1°C). Weather in July »

Weather in August

August, the last month of the summer, in Saint Johns, is another warm month, with average temperature varying between 61.3°F (16.3°C) and 81.3°F (27.4°C). In Saint Johns, the average high-temperature in August is relatively the same as in July - a still warm 81.3°F (27.4°C). Weather in August »

Weather in September

September, the first month of the autumn, in Saint Johns, is still a pleasant month, with average temperature ranging between min 52.5°F (11.4°C) and max 70.5°F (21.4°C). In Saint Johns, Montana, the average high-temperature in September drops, from a warm 81.3°F (27.4°C) in August, to an agreeable 70.5°F (21.4°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Saint Johns, Montana, with average temperature ranging between min 38.8°F (3.8°C) and max 54.3°F (12.4°C). In October, the average high-temperature declines considerably, from a pleasant 70.5°F (21.4°C) in September, to a fresh 54.3°F (12.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Saint Johns, Montana, with temperature in the range of an average high of 39.4°F (4.1°C) and an average low of 26.2°F (-3.2°C). In November, the average high-temperature declines considerably, from a fresh 54.3°F (12.4°C) in October, to a wintry 39.4°F (4.1°C). Weather in November »

Weather in December

December, the first month of the winter, in Saint Johns, is also a subzero cold month, with average temperature ranging between min 15.4°F (-9.2°C) and max 27.1°F (-2.7°C). The coldest months are January and December, with an average high-temperature of 27.1°F (-2.7°C). Weather in December »
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FAQ

What is the coldest month in Saint Johns?

The coldest months are January and December, with an average high-temperature of 27.1°F (-2.7°C).

What is the most humid month in Saint Johns?

With an average relative humidity of 83%, January is the most humid month.

How many days does it rain in Saint Johns?

Throughout the year, in Saint Johns, there are 98.7 rainfall days, and 8.23" (209mm) of precipitation is accumulated.

When does it snow in Saint Johns?

Months with snowfall are January through May, September through December.

How much does it snow in Saint Johns?

In Saint Johns, during the entire year, snow falls for 53.5 days, and aggregates up to 14.25" (362mm) of snow.

What is the month with the lowest UV index in Saint Johns?

Months with the lowest UV index in Saint Johns are January through March, October through December, with an average maximum UV index of 2.

When does it snow the most in Saint Johns?

The month with the most snowfall in Saint Johns is February when snow falls for 11 days and typically aggregates up to 2.72" (69mm) of snow.

What is the month with the least sunshine in Saint Johns?

With an average of 5.3h of sunshine, February has the least sunshine of the year.

What is the rainiest month in Saint Johns?

The month with the most rainfall in Saint Johns is June when the rain falls for 13.4 days and typically aggregates up to 1.5" (38mm) of precipitation.

When it does not snow in Saint Johns?

June through August are months without snowfall.

When are the longest days in Saint Johns?

With an average of 16.1h of daylight, June has the longest days of the year in Saint Johns, Montana.

What is the warmest month in Saint Johns?

With an average high-temperature of 82.8°F (28.2°C) and an average low-temperature of 60.4°F (15.8°C), July is the warmest month in Saint Johns.

What month has the most sunshine in Saint Johns?

With an average of 12h of sunshine, July has the most sunshine of the year in Saint Johns.

When is the highest UV index in Saint Johns?

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

What is the least humid month in Saint Johns?

With an average relative humidity of 40%, August is the least humid month in Saint Johns, Montana.

What is the driest month in Saint Johns?

The month with the least rainfall in Saint Johns, Montana, is December when the rain falls for 4.4 days and typically collects 0.31" (8mm) of precipitation.

What is the month with the shortest days in Saint Johns?

December has the shortest days of the year, with an average of 8.4h of daylight.

Average temperature
Saint Johns, MT

Average temperature - Saint Johns, MT

The warmest month (with the highest average high temperature) is July (82.8°F).
Months with the lowest average high temperature are January and December (27.1°F).

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).

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Average pressure
Saint Johns, MT

Average pressure - Saint Johns, MT

Months with the highest atmospheric pressure are January and February (30.12").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed
Saint Johns, MT

Average wind speed - Saint Johns, MT

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

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Average rainfall
Saint Johns, MT

Average rainfall - Saint Johns, MT

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").

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Average rainfall days
Saint Johns, MT

Average rainfall days - Saint Johns, MT

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).

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Average snowfall
Saint Johns, MT

Average snowfall - Saint Johns, MT

The month with the highest snowfall is February (2.72").
Months with the least snowfall are June, July and August (0").

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Average snowfall days
Saint Johns, MT

Average snowfall days - Saint Johns, MT

The month with the highest number of snowfall days is February (11 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Saint Johns, MT

Average daylight / Average sunshine - Saint Johns, MT

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.4h).

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5.3h).

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Average sunshine days
Saint Johns, MT

Average sunshine days - Saint Johns, MT

The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).

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Average UV index
Saint Johns, MT

Average UV index - Saint Johns, MT

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average visibility
Saint Johns, MT

Average visibility - Saint Johns, MT

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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