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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 Portsmouth, Ohio, is another cold winter month, with an average temperature varying between 37.8°F (3.2°C) and 24.3°F (-4.3°C). January, having an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 24.3°F (-4.3°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Portsmouth, is also an icy month, with an average temperature ranging between max 42.1°F (5.6°C) and min 27.3°F (-2.6°C). January's transformation into February witnesses an average high-temperature of a still cold 42.1°F (5.6°C), noting a minor change from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Portsmouth, is a fresh month, with an average temperature ranging between min 35.4°F (1.9°C) and max 52.5°F (11.4°C). As Portsmouth welcomes March, the average high-temperature sees a rise, transitioning from a cold 42.1°F (5.6°C) in February to a cool 52.5°F (11.4°C). Weather in March »
Weather in April
April in Portsmouth, Ohio, is an enjoyable spring month, with an average temperature ranging between min 45.1°F (7.3°C) and max 64.9°F (18.3°C). With the onset of April, Portsmouth's weather sees a temperature rise, transitioning from a fresh 52.5°F (11.4°C) in March to a comfortable 64.9°F (18.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Portsmouth, Ohio, with an average temperature fluctuating between 54.3°F (12.4°C) and 75.2°F (24°C). With the onset of May, Portsmouth experiences a temperature shift, with the average high-temperature moving from a comfortable 64.9°F (18.3°C) in April to a warm 75.2°F (24°C). Weather in May »
Weather in June
June, the first month of the summer in Portsmouth, is still a warm month, with an average temperature fluctuating between 60.8°F (16°C) and 82.9°F (28.3°C). June brings a slight increase in the average high-temperature, progressing from 75.2°F (24°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »
Weather in July
July in Portsmouth, Ohio, is a tropical summer month, with an average temperature fluctuating between 86°F (30°C) and 64°F (17.8°C). July, characterized by an average high temperature of 86°F (30°C) and a low temperature of 64°F (17.8°C), is generally the warmest month. During July, the heat index is evaluated at a sweltering 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Portsmouth, is also a moderately hot month, with an average temperature varying between 62.1°F (16.7°C) and 84.9°F (29.4°C). The average high-temperature is a moderately hot 84.9°F (29.4°C) in August, hardly different from the 86°F (30°C) recorded in July. Weather in August »
Weather in September
September, the first month of the autumn in Portsmouth, is still a warm month, with an average temperature ranging between min 56.7°F (13.7°C) and max 78.4°F (25.8°C). Portsmouth's September weather features a light decline in high-temperatures, reducing from a moderately hot 84.9°F (29.4°C) in August to a still warm 78.4°F (25.8°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Portsmouth, Ohio, with temperature in the range of an average low of 46.8°F (8.2°C) and an average high of 65.3°F (18.5°C). The move into October indicates a reduction in the average high-temperature, down from September's moderately hot 78.4°F (25.8°C) to a comfortable 65.3°F (18.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Portsmouth, is another cool month, with an average temperature fluctuating between 52°F (11.1°C) and 36.5°F (2.5°C). With the beginning of November, the average high-temperature shows a decrease, transitioning from a comfortable 65.3°F (18.5°C) in October to a fresh 52°F (11.1°C). Weather in November »
Weather in December
December, the first month of the winter in Portsmouth, is still a chilly month, with an average temperature varying between 43°F (6.1°C) and 31.1°F (-0.5°C). With the beginning of December, the average high-temperature shows a decrease, transitioning from a fresh 52°F (11.1°C) in November to a chilly 43°F (6.1°C). Weather in December »
Updated: Jul 29, 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 is the coldest month?
In Portsmouth, the lowest temperatures are generally noted in January, averaging a high of 37.8°F (3.2°C) and a low of 24.3°F (-4.3°C).
How many days does it rain?
In Portsmouth, during the entire year, the rain falls for 170.4 days and collects up to 31.02" (788mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 10.6 days and accumulates 3.19" (81mm) of snow.
How much does it snow?
Throughout the year, in Portsmouth, there are 36.7 snowfall days, and 11.57" (294mm) of snow is accumulated.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.9h of sunshine.
When is 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?
February and December, with an average relative humidity of 81%, are most humid months in Portsmouth.
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 wettest month?
May is the month with the most rainfall. Rain falls for 18.3 days and accumulates 3.19" (81mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
What is the month with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
With an average of 14h and 48min of daylight, June has the longest days of the year in Portsmouth, Ohio.
What time of the year is the hottest in Portsmouth?
Portsmouth's warmest temperatures are experienced in July, with average high temperatures of 86°F (30°C) and lows of 64°F (17.8°C).
What is the least humid month?
With an average relative humidity of 75%, August is the least humid month.
What month has the most sunshine?
With an average of 10.4h of sunshine, August has the most sunshine of the year.
What is the driest month in Portsmouth?
September is the month with the least rainfall. Rain falls for 13.3 days and accumulates 1.85" (47mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Portsmouth, OH
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Portsmouth, OH
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed
Portsmouth, OH
- Average wind speed in January:
7.5mph - Average wind speed in February:
7.5mph - Average wind speed in March:
7.1mph - Average wind speed in April:
7.3mph - Average wind speed in May:
6mph - Average wind speed in June:
5.4mph
- Average wind speed in July:
4.6mph - Average wind speed in August:
4.5mph - Average wind speed in September:
4.9mph - Average wind speed in October:
6mph - Average wind speed in November:
6.4mph - Average wind speed in December:
7mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity
Portsmouth, OH
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (75%).
Average rainfall
Portsmouth, OH
- Average rainfall in January:
2.28" - Average rainfall in February:
2.76" - Average rainfall in March:
3.03" - Average rainfall in April:
3.15" - Average rainfall in May:
3.19" - Average rainfall in June:
2.48"
- Average rainfall in July:
2.72" - Average rainfall in August:
2.28" - Average rainfall in September:
1.85" - Average rainfall in October:
2.17" - Average rainfall in November:
2.17" - Average rainfall in December:
2.95"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days
Portsmouth, OH
- Average rainfall days in January:
11.5 days - Average rainfall days in February:
12.2 days - Average rainfall days in March:
14.8 days - Average rainfall days in April:
16 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
14.3 days - Average rainfall days in September:
13.3 days - Average rainfall days in October:
13 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
13.4 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (10.5 days).
Average snowfall
Portsmouth, OH
The month with the highest snowfall is January (3.19").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Portsmouth, OH
- Average snowfall days in January:
10.6 days - Average snowfall days in February:
8.6 days - Average snowfall days in March:
5.7 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0 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:
0.2 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
8.4 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Portsmouth, OH
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- 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 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 5min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Portsmouth, OH
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
10 days - Average sunshine days in March:
10.8 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
10.2 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
13.9 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
11.9 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is February (10 days).
Average UV index
Portsmouth, OH
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
Portsmouth, OH
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Portsmouth, OH
The months with the highest visibility are March, April, June, October and November (6mi).
The months with the lowest visibility are January, February, May, July, August, September and December (5mi).
Portsmouth, Ohio, USA
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