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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Saint Johns, Pennsylvania, with an average temperature fluctuating between 31.5°F (-0.3°C) and 18.9°F (-7.3°C). In Saint Johns, January is the month with the lowest recorded average temperatures, measuring a high of 31.5°F (-0.3°C) and a low of 18.9°F (-7.3°C). Weather in January »
Weather in February
February, the last month of the winter in Saint Johns, is a wintry month, with an average temperature ranging between min 20.7°F (-6.3°C) and max 35.1°F (1.7°C). February's onset records a minor alteration in the average high-temperature to a cold 35.1°F (1.7°C) from January's 31.5°F (-0.3°C). Weather in February »
Weather in March
March, the first month of the spring in Saint Johns, is a frosty month, with an average temperature fluctuating between 27.9°F (-2.3°C) and 43.7°F (6.5°C). With the start of March, the average high-temperature marginally shifts from February's icy 35.1°F (1.7°C) to a chilly 43.7°F (6.5°C). Weather in March »
Weather in April
April is a moderate spring month in Saint Johns, Pennsylvania, with an average temperature fluctuating between 55.8°F (13.2°C) and 38.1°F (3.4°C). With the onset of April, Saint Johns experiences a temperature shift, with the average high-temperature moving from a frosty 43.7°F (6.5°C) in March to a moderate 55.8°F (13.2°C). Weather in April »
Weather in May
May, the last month of the spring in Saint Johns, is a refreshing month, with temperature in the range of an average high of 67.1°F (19.5°C) and an average low of 48°F (8.9°C). An escalation in the average high-temperature is seen with the onset of May, moving from a moderate 55.8°F (13.2°C) in April to an enjoyable 67.1°F (19.5°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Saint Johns, Pennsylvania, with an average temperature varying between 54.9°F (12.7°C) and 74.8°F (23.8°C). In Saint Johns, the average high-temperature in June slightly rises, from a comfortable 67.1°F (19.5°C) in May, to a warm 74.8°F (23.8°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Saint Johns, Pennsylvania, with an average temperature fluctuating between 81°F (27.2°C) and 59.5°F (15.3°C). July, having an average high-temperature of 81°F (27.2°C) and an average low-temperature of 59.5°F (15.3°C), is the warmest month. The heat index value for July is calculated to be a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Saint Johns, is also a moderately hot month, with an average temperature varying between 78.4°F (25.8°C) and 57.7°F (14.3°C). The onset of August notes an average high-temperature of a still warm 78.4°F (25.8°C), subtly shifted from July's 81°F (27.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Saint Johns, is also an agreeable month, with an average temperature ranging between max 72°F (22.2°C) and min 52°F (11.1°C). The shift from August to September includes a small decrease in the average high-temperature, from a warm 78.4°F (25.8°C) to an agreeable 72°F (22.2°C). Weather in September »
Weather in October
October, the same as September, in Saint Johns, Pennsylvania, is another refreshing autumn month, with temperature in the range of an average high of 58.8°F (14.9°C) and an average low of 43.7°F (6.5°C). In Saint Johns, entering October brings a temperature decrement, reducing from September's pleasant 72°F (22.2°C) to a moderate 58.8°F (14.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Saint Johns, is also a frosty month, with temperature in the range of an average low of 32.9°F (0.5°C) and an average high of 46.9°F (8.3°C). November brings a decrease in the average high-temperature, shifting from a mild 58.8°F (14.9°C) in October to a chilly 46.9°F (8.3°C). Weather in November »
Weather in December
December, the first month of the winter in Saint Johns, is also an icy month, with temperature in the range of an average high of 37.2°F (2.9°C) and an average low of 26.2°F (-3.2°C). Observing a mild shift, the average high-temperature during December reduces from November's frosty 46.9°F (8.3°C) to a cold 37.2°F (2.9°C). Weather in December »
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
January brings the lowest temperatures, with an average high of 31.5°F (-0.3°C) and an average low of 18.9°F (-7.3°C).
How many days does it rain?
In Saint Johns, during the entire year, the rain falls for 111.5 days and collects up to 11.34" (288mm) of precipitation.
When does it snow?
January through May, October through December are months with snowfall in Saint Johns.
How many days does it snow?
Throughout the year, there are 31.5 snowfall days, and 7.28" (185mm) of snow is accumulated.
What is the month with the lowest UV index?
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.
What is the most humid month?
With an average relative humidity of 84%, February is the most humid month.
When does it snow the most?
February is the month with the most snowfall. Snow falls for 7.9 days and accumulates 1.81" (46mm) of snow.
What is the month with the least sunshine?
With an average of 3.6h of sunshine, February has the least sunshine of the year.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month?
April is the least humid month, with an average relative humidity of 78%.
What is the wettest month?
May is the month with the most rainfall. Rain falls for 13.8 days and accumulates 1.26" (32mm) of precipitation.
When it does not snow?
In Saint Johns, snow does not fall in June through September.
When are the longest days in Saint Johns?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What are the warmest months?
With its average high temperature of 81°F (27.2°C) and a low of 59.5°F (15.3°C), July is regarded as the warmest month.
What month has the most sunshine?
With an average of 9.9h of sunshine, July has the most sunshine of the year in Saint Johns.
When is the highest UV index?
July is the month with the highest UV index, with an average maximum UV index of 6.
What is the driest month?
The month with the least rainfall in Saint Johns is September, when the rain falls for 8.9 days and typically collects 0.55" (14mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year in Saint Johns, with an average of 9h and 18min of daylight.
Average temperature
Saint Johns, PA
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Saint Johns, PA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.07"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Saint Johns, PA
- Average wind speed in January:
8.2mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6.1mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.9mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.8mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity
Saint Johns, PA
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (78%).
Average rainfall
Saint Johns, PA
- Average rainfall in January:
0.87" - Average rainfall in February:
0.79" - Average rainfall in March:
0.87" - Average rainfall in April:
1.14" - Average rainfall in May:
1.26" - Average rainfall in June:
0.91"
- Average rainfall in July:
1.14" - Average rainfall in August:
1.06" - Average rainfall in September:
0.55" - Average rainfall in October:
0.91" - Average rainfall in November:
0.98" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days
Saint Johns, PA
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
5.9 days - Average rainfall days in March:
8.6 days - Average rainfall days in April:
12.6 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
10.8 days
- Average rainfall days in July:
12.3 days - Average rainfall days in August:
10.2 days - Average rainfall days in September:
8.9 days - Average rainfall days in October:
9.2 days - Average rainfall days in November:
6.5 days - Average rainfall days in December:
7.3 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall
Saint Johns, PA
- Average snowfall in January:
1.69" - Average snowfall in February:
1.81" - Average snowfall in March:
1.65" - Average snowfall in April:
0.08" - Average snowfall in May:
0.16" - Average snowfall in June:
0"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Saint Johns, PA
- Average snowfall days in January:
9.9 days - Average snowfall days in February:
7.9 days - Average snowfall days in March:
4.7 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
5.3 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Saint Johns, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 4min - Average sunshine in April:
7h and 1min - Average sunshine in May:
7h and 4min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 2min - Average sunshine in September:
8h and 2min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 5min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days
Saint Johns, PA
- Average sunshine days in January:
18.9 days - Average sunshine days in February:
16.6 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
15.2 days - Average sunshine days in May:
14.3 days - Average sunshine days in June:
16 days
- Average sunshine days in July:
16.1 days - Average sunshine days in August:
18.1 days - Average sunshine days in September:
18.6 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20.6 days - Average sunshine days in December:
19 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index
Saint Johns, PA
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover
Saint Johns, PA
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility
Saint Johns, 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).
Saint Johns, Pennsylvania, USA
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