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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, in Marietta, Pennsylvania, is another cold winter month, with an average temperature ranging between min 22.8°F (-5.1°C) and max 35.4°F (1.9°C). During the coldest month, January, temperatures average a high of 35.4°F (1.9°C) and a low of 22.8°F (-5.1°C). Weather in January »
Weather in February
The last month of the winter, February, is another cold month in Marietta, Pennsylvania, with temperature in the range of an average high of 39.4°F (4.1°C) and an average low of 24.8°F (-4°C). The commencement of February notes an average high-temperature of a still icy 39.4°F (4.1°C), exhibiting little difference from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Marietta, is a frosty month, with an average temperature fluctuating between 32.4°F (0.2°C) and 48.4°F (9.1°C). As Marietta transitions into March, the average high-temperature is observed to rise from a wintry 39.4°F (4.1°C) in February to a frosty 48.4°F (9.1°C). Weather in March »
Weather in April
April is a refreshing spring month in Marietta, Pennsylvania, with an average temperature ranging between min 42.4°F (5.8°C) and max 60.6°F (15.9°C). As Marietta transitions into April, the average high-temperature shows a change, moving from a frosty 48.4°F (9.1°C) in March to a refreshing 60.6°F (15.9°C). Weather in April »
Weather in May
May, the last month of the spring in Marietta, is an agreeable month, with an average temperature fluctuating between 52.5°F (11.4°C) and 70.2°F (21.2°C). Marietta's weather shows a temperature rise with the arrival of May, moving from a moderate 60.6°F (15.9°C) in April to a pleasant 70.2°F (21.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Marietta, Pennsylvania, with an average temperature fluctuating between 59.7°F (15.4°C) and 78.1°F (25.6°C). June's arrival brings a slight change in high-temperatures, adjusting from a pleasant 70.2°F (21.2°C) in May to a moderately hot 78.1°F (25.6°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Marietta, Pennsylvania, with an average temperature varying between 64.4°F (18°C) and 82.9°F (28.3°C). The month of July sees the highest average temperatures, reaching 82.9°F (28.3°C) at the peak and 64.4°F (18°C) at the low. July's average heat index is computed to be a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Marietta, is another warm month, with an average temperature ranging between min 62.2°F (16.8°C) and max 81.1°F (27.3°C). The transition into August marks the average high-temperature at a still moderately hot 81.1°F (27.3°C), differing minimally from July's 82.9°F (28.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Marietta, is also a moderately hot month, with an average temperature fluctuating between 56.3°F (13.5°C) and 75°F (23.9°C). September brings a slight decrease in the average high-temperature, shifting from a moderately hot 81.1°F (27.3°C) in August to a still warm 75°F (23.9°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Marietta, Pennsylvania, with an average temperature varying between 63°F (17.2°C) and 47.1°F (8.4°C). Marietta observes a minor decrease in the average high-temperature with the arrival of October, falling from September's warm 75°F (23.9°C) to an enjoyable 63°F (17.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Marietta, Pennsylvania, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 51.1°F (10.6°C). The beginning of November involves a decrease in the average high-temperature, transitioning from a refreshing 63°F (17.2°C) in October to a fresh 51.1°F (10.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Marietta, Pennsylvania, with an average temperature fluctuating between 30°F (-1.1°C) and 41.9°F (5.5°C). December's onset brings a slight change in high-temperatures, falling from a fresh 51.1°F (10.6°C) in November to a cold 41.9°F (5.5°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 are the coldest months in Marietta?
Temperature records mark January as the coldest month, with highs averaging 35.4°F (1.9°C) and lows at 22.8°F (-5.1°C).
What is the driest month?
January is the month with the least rainfall. Rain falls for 5.8 days and accumulates 0.98" (25mm) of precipitation.
How much does it rain?
Throughout the year, in Marietta, there are 130.2 rainfall days, and 16.22" (412mm) of precipitation is accumulated.
When does it snow?
January through April, November and December are months with snowfall.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 6.5 days and typically aggregates up to 1.89" (48mm) of snow.
How much does it snow in Marietta?
In Marietta, during the entire year, snow falls for 18.9 days and aggregates up to 6.1" (155mm) of snow.
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 is the month with the least sunshine?
February has the least sunshine of the year, with an average of 4.5h of sunshine.
What is the least humid month?
March and April, with an average relative humidity of 76%, are the least humid months.
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 most humid month?
The most humid month is May, with an average relative humidity of 81%.
When it does not snow?
In Marietta, Pennsylvania, snow does not fall in May through October.
What are the months with the highest UV index in Marietta?
The months with the highest UV index are May through July, with an average maximum UV index of 6.
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 in Marietta?
With an average high-temperature of 82.9°F (28.3°C) and an average low-temperature of 64.4°F (18°C), July is the warmest month.
What month has the most sunshine?
With an average of 10.4h of sunshine, July has the most sunshine of the year.
What is the rainiest month in Marietta?
The month with the most rainfall is August, when the rain falls for 13 days and typically aggregates up to 1.89" (48mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Marietta, PA
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.4°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure
Marietta, PA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"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:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"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
Marietta, PA
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.9mph - Average wind speed in April:
8.8mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.6mph - Average wind speed in December:
8.3mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity
Marietta, PA
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall
Marietta, PA
- Average rainfall in January:
0.98" - Average rainfall in February:
1.02" - Average rainfall in March:
1.1" - Average rainfall in April:
1.3" - Average rainfall in May:
1.69" - Average rainfall in June:
1.54"
- Average rainfall in July:
1.85" - Average rainfall in August:
1.89" - Average rainfall in September:
1.1" - Average rainfall in October:
1.46" - Average rainfall in November:
1.14" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days
Marietta, PA
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
6.9 days - Average rainfall days in March:
10.1 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
15.2 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
13 days - Average rainfall days in September:
10.2 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
9.3 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.8 days).
Average snowfall
Marietta, PA
The month with the highest snowfall is January (1.89").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Marietta, PA
- Average snowfall days in January:
6.5 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.2 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 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
3 days
The month with the highest number of snowfall days is January (6.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Marietta, 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:
4h and 4min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 1min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Marietta, PA
- Average sunshine days in January:
19.8 days - Average sunshine days in February:
16.4 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
14.1 days - Average sunshine days in May:
13.2 days - Average sunshine days in June:
14.2 days
- Average sunshine days in July:
13.6 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
18 days - Average sunshine days in November:
21.1 days - Average sunshine days in December:
18.5 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (13.2 days).
Average UV index
Marietta, PA
The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Marietta, PA
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Marietta, PA
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
Marietta, Pennsylvania, USA
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