Climate and monthly weather forecast
Johnstown, PA

Weather in January

January, the same as December, in Johnstown, Pennsylvania, is another subzero cold winter month, with an average temperature ranging between min 18.9°F (-7.3°C) and max 30.7°F (-0.7°C). With an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 18.9°F (-7.3°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is a wintry month in Johnstown, Pennsylvania, with an average temperature ranging between max 35.2°F (1.8°C) and min 21.6°F (-5.8°C). In February, the average high-temperature is almost the same as in January - a cold 35.2°F (1.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Johnstown, Pennsylvania, with an average temperature fluctuating between 44.2°F (6.8°C) and 28.8°F (-1.8°C). In Johnstown, the average high-temperature in March rises from a cold 35.2°F (1.8°C) in February to a chilly 44.2°F (6.8°C). Weather in March »

Weather in April

April is a mild spring month in Johnstown, Pennsylvania, with an average temperature ranging between min 38.5°F (3.6°C) and max 57°F (13.9°C). In April, the average high-temperature increases from a frosty 44.2°F (6.8°C) in March to a mild 57°F (13.9°C). Weather in April »

Weather in May

May, the last month of the spring in Johnstown, is an agreeable month, with an average temperature ranging between max 68°F (20°C) and min 48.7°F (9.3°C). In Johnstown, the average high-temperature in May increases from a moderate 57°F (13.9°C) in April to an agreeable 68°F (20°C). Weather in May »

Weather in June

June, the first month of the summer in Johnstown, is a moderately hot month, with an average temperature ranging between max 75.6°F (24.2°C) and min 55°F (12.8°C). In June, the average high-temperature marginally rises from an agreeable 68°F (20°C) in May to a moderately hot 75.6°F (24.2°C). Weather in June »

Weather in July

July, like June, in Johnstown, Pennsylvania, is a moderately hot summer month, with an average temperature varying between 80.2°F (26.8°C) and 58.8°F (14.9°C). The warmest month is July, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 58.8°F (14.9°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Johnstown, Pennsylvania, with an average temperature fluctuating between 77.9°F (25.5°C) and 56.8°F (13.8°C). In Johnstown, the average high-temperature in August is essentially the same as in July - a still warm 77.9°F (25.5°C). Weather in August »

Weather in September

September, the first month of the autumn in Johnstown, is also an agreeable month, with an average temperature varying between 72.1°F (22.3°C) and 52.7°F (11.5°C). In September, the average high-temperature marginally drops from a warm 77.9°F (25.5°C) in August to an agreeable 72.1°F (22.3°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Johnstown, Pennsylvania, with an average temperature varying between 59°F (15°C) and 43.3°F (6.3°C). In Johnstown, the average high-temperature in October drops from an agreeable 72.1°F (22.3°C) in September to a mild 59°F (15°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Johnstown, Pennsylvania, with an average temperature varying between 46.6°F (8.1°C) and 32°F (0°C). In November, the average high-temperature decreases from a moderate 59°F (15°C) in October to a frosty 46.6°F (8.1°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Johnstown, Pennsylvania, with an average temperature fluctuating between 26.1°F (-3.3°C) and 36.9°F (2.7°C). In December, the average high-temperature decreases from a chilly 46.6°F (8.1°C) in November to a cold 36.9°F (2.7°C). Weather in December »
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FAQ

What is the coldest month in Johnstown?

The coldest month is January, with an average high-temperature of 30.7°F (-0.7°C) and an average low-temperature of 18.9°F (-7.3°C).

How many days does it rain in Johnstown?

Throughout the year, in Johnstown, Pennsylvania, there are 152.7 rainfall days, and 21.1" (536mm) of precipitation is accumulated.

When does it snow in Johnstown?

January through May, October through December are months with snowfall.

How much does it snow in Johnstown?

In Johnstown, Pennsylvania, during the entire year, snow falls for 47.7 days and aggregates up to 18.23" (463mm) of snow.

What is the month with the least sunshine in Johnstown?

January has the least sunshine of the year in Johnstown, with an average of 3h of sunshine.

What is the most humid month in Johnstown?

The most humid month in Johnstown, Pennsylvania, is February, with an average relative humidity of 87%.

When does it snow the most in Johnstown?

March is the month with the most snowfall. Snow falls for 8.2 days and accumulates 4.21" (107mm) of snow.

When is Daylight Saving Time (DST) in Johnstown?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.

What is the wettest month in Johnstown?

The month with the most rainfall is May, when the rain falls for 19.8 days and typically aggregates up to 2.56" (65mm) of precipitation.

What is the month with the highest UV index in Johnstown?

May through August, with an average maximum UV index of 5, are months with the highest UV index in Johnstown, Pennsylvania.

When it does not snow in Johnstown?

In Johnstown, snow does not fall in June through September.

When are the longest days in Johnstown?

The month with the longest days in Johnstown, Pennsylvania, is June, with an average of 15h and 0min of daylight.

What is the warmest month in Johnstown?

With an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 58.8°F (14.9°C), July is the warmest month in Johnstown, Pennsylvania.

What is the least humid month in Johnstown?

The least humid month in Johnstown is July, with an average relative humidity of 78%.

What month has the most sunshine in Johnstown?

The month with the most sunshine in Johnstown is July, with an average of 9.8h of sunshine.

What is the driest month in Johnstown?

November is the month with the least rainfall. Rain falls for 7.8 days and accumulates 1.1" (28mm) of precipitation.

What is the month with the shortest days in Johnstown?

With an average of 9h and 21min of daylight, December has the shortest days of the year in Johnstown.

When is the lowest UV index in Johnstown?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average pressure
Johnstown, PA

Average pressure - Johnstown, PA

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed
Johnstown, PA

Average wind speed - Johnstown, PA

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average rainfall
Johnstown, PA

Average rainfall - Johnstown, PA

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is November (1.1").

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Average rainfall days
Johnstown, PA

Average rainfall days - Johnstown, PA

The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall
Johnstown, PA

Average snowfall - Johnstown, PA

The month with the highest snowfall is March (4.21").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Johnstown, PA

Average snowfall days - Johnstown, PA

The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Johnstown, PA

Average daylight / Average sunshine - Johnstown, PA

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days
Johnstown, PA

Average sunshine days - Johnstown, PA

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is May (9 days).

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Average visibility
Johnstown, PA

Average visibility - Johnstown, PA

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

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