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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, the same as December, is another cold winter month in Chatham, Pennsylvania, with an average temperature fluctuating between 24.6°F (-4.1°C) and 36.9°F (2.7°C). January, with an average high of 36.9°F (2.7°C) and a low of 24.6°F (-4.1°C), signifies the coldest month of the year. Weather in January »
Weather in February
February, the last month of the winter in Chatham, is another cold month, with temperature in the range of an average low of 27°F (-2.8°C) and an average high of 40.1°F (4.5°C). Chatham's February reports an average high-temperature of a still icy 40.1°F (4.5°C), exhibiting a minor difference from January. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Chatham, Pennsylvania, with an average temperature varying between 48.7°F (9.3°C) and 33.8°F (1°C). March's arrival brings a slight change in high-temperatures, adjusting from a cold 40.1°F (4.5°C) in February to a frosty 48.7°F (9.3°C). Weather in March »
Weather in April
April in Chatham, Pennsylvania, is an enjoyable spring month, with an average temperature ranging between max 61.2°F (16.2°C) and min 43.9°F (6.6°C). With the onset of April, the average high-temperature slightly shifts from March's frosty 48.7°F (9.3°C) to a refreshing 61.2°F (16.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Chatham, Pennsylvania, with an average temperature ranging between max 70.9°F (21.6°C) and min 53.6°F (12°C). With the onset of May, Chatham's average high-temperature sees a rise, moving from April's enjoyable 61.2°F (16.2°C) to a pleasant 70.9°F (21.6°C). Weather in May »
Weather in June
June, the first month of the summer in Chatham, is a moderately hot month, with an average temperature fluctuating between 78.6°F (25.9°C) and 61.5°F (16.4°C). With the onset of June, Chatham's average high-temperature sees a modest rise, moving from May's pleasant 70.9°F (21.6°C) to a moderately hot 78.6°F (25.9°C). Weather in June »
Weather in July
July, like June, in Chatham, Pennsylvania, is a moderately hot summer month, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 66.6°F (19.2°C). Chatham's warmest month, July, generally records average temperatures ranging from a high of 84.2°F (29°C) to a low of 66.6°F (19.2°C). The heat index in July is appraised at a hot 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Chatham, is also a moderately hot month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 64.9°F (18.3°C). August notes an average high-temperature of a still moderately hot 81.9°F (27.7°C), subtly differing from July's 84.2°F (29°C). Weather in August »
Weather in September
September, the first month of the autumn in Chatham, is also a moderately hot month, with an average temperature fluctuating between 75°F (23.9°C) and 58.8°F (14.9°C). September signifies a minor drop in average high-temperature, transitioning from 81.9°F (27.7°C) in August to a still moderately hot 75°F (23.9°C). Weather in September »
Weather in October
October, like September, in Chatham, Pennsylvania, is another comfortable autumn month, with an average temperature fluctuating between 63.5°F (17.5°C) and 48.9°F (9.4°C). The transition into October indicates a reduction in the average high-temperature, down to an enjoyable 63.5°F (17.5°C) from September's warm 75°F (23.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Chatham, is also a fresh month, with an average temperature fluctuating between 37.8°F (3.2°C) and 52°F (11.1°C). November is characterized by a reduction in the average high-temperature, from a refreshing 63.5°F (17.5°C) in October to a cool 52°F (11.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Chatham, Pennsylvania, with temperature in the range of an average high of 43°F (6.1°C) and an average low of 31.5°F (-0.3°C). Chatham's transition into December involves a shift in temperature, receding from a cool 52°F (11.1°C) in November to a chilly 43°F (6.1°C). Weather in December »
Updated: Aug 6, 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 are the coldest months?
January, known for its average high temperature of 36.9°F (2.7°C) and an average low temperature of 24.6°F (-4.1°C), is the coldest month.
What is the driest month in Chatham?
January, September and November are months with the least rain when the rain falls for 5.9 days and typically aggregates up to 0.87" (22mm) of rain.
How many days does it rain?
In Chatham, during the entire year, the rain falls for 126.3 days and collects up to 14.25" (362mm) of precipitation.
When does it snow?
January through May, November and December are months with snowfall.
How many days does it snow?
Throughout the year, there are 15.4 snowfall days, and 4.33" (110mm) of snow is accumulated.
What is the month with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What are the most humid months?
The months with the highest humidity are February, May, September, October and December, with an average relative humidity of 79%.
What is the month with the least sunshine?
With an average of 4.8h of sunshine, February has the least sunshine of the year.
What is the least humid month in Chatham?
March and April, with an average relative humidity of 75%, are the least humid months in Chatham, Pennsylvania.
When does it snow the most?
The month with the most snowfall is March, when snow falls for 3.3 days and typically aggregates up to 1.26" (32mm) of snow.
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 month with the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When it does not snow?
In Chatham, snow does not fall in June through October.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What part of the year is the hottest?
The average temperatures reach their apex in July, averaging 84.2°F (29°C) at the high end and 66.6°F (19.2°C) at the low end.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.7h of sunshine.
What is the rainiest month in Chatham?
The month with the most rainfall is August, when the rain falls for 13.7 days and typically aggregates up to 1.93" (49mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Chatham, PA
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36.9°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure
Chatham, 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:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.1"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
Chatham, PA
- Average wind speed in January:
8.7mph - Average wind speed in February:
8.8mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.6mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7.2mph - Average wind speed in November:
7.6mph - Average wind speed in December:
8.2mph
The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity
Chatham, PA
The months with the highest relative humidity are February, May, September, October and December (79%).
The months with the lowest relative humidity are March and April (75%).
Average rainfall
Chatham, PA
- Average rainfall in January:
0.87" - Average rainfall in February:
0.91" - Average rainfall in March:
1.14" - Average rainfall in April:
1.02" - Average rainfall in May:
1.42" - Average rainfall in June:
1.34"
- Average rainfall in July:
1.69" - Average rainfall in August:
1.93" - Average rainfall in September:
0.87" - Average rainfall in October:
0.98" - Average rainfall in November:
0.87" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is August (1.93").
The driest months (with the least rainfall) are January, September and November (0.87").
Average rainfall days
Chatham, PA
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
7.8 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
11.6 days - Average rainfall days in May:
13.9 days - Average rainfall days in June:
13.1 days
- Average rainfall days in July:
14.9 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
10.8 days - Average rainfall days in October:
9.3 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is January (5.9 days).
Average snowfall
Chatham, PA
- Average snowfall in January:
1.18" - Average snowfall in February:
0.79" - Average snowfall in March:
1.26" - Average snowfall in April:
0.16" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is March (1.26").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Chatham, PA
- Average snowfall days in January:
5.1 days - Average snowfall days in February:
3.9 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.1 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Chatham, 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
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).
- Average sunshine in January:
5h and 0min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Chatham, PA
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
17 days - Average sunshine days in March:
17.6 days - Average sunshine days in April:
16.2 days - Average sunshine days in May:
14.4 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
12.9 days - Average sunshine days in August:
13.6 days - Average sunshine days in September:
17.6 days - Average sunshine days in October:
19.2 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
19.9 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (12.9 days).
Average UV index
Chatham, PA
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Chatham, PA
The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Chatham, PA
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Chatham, Pennsylvania, USA
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