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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 an icy winter month in Potomac, Maryland, with an average temperature fluctuating between 39.4°F (4.1°C) and 26.4°F (-3.1°C). With average high and low temperatures of 39.4°F (4.1°C) and 26.4°F (-3.1°C) respectively, January is Potomac's coldest month. Weather in January »
Weather in February
February, the last month of the winter in Potomac, is a frosty month, with temperature in the range of an average low of 28.8°F (-1.8°C) and an average high of 43.9°F (6.6°C). A minor adjustment in Potomac's average high-temperature is noted with the start of February, touching a frosty 43.9°F (6.6°C) from January's 39.4°F (4.1°C). Weather in February »
Weather in March
March, the first month of the spring in Potomac, is a fresh month, with an average temperature ranging between min 36.1°F (2.3°C) and max 52.3°F (11.3°C). The average high-temperature mildly increases in March, edging from a frosty 43.9°F (6.6°C) in February to a cool 52.3°F (11.3°C). Weather in March »
Weather in April
April is a refreshing spring month in Potomac, Maryland, with an average temperature fluctuating between 46°F (7.8°C) and 64.9°F (18.3°C). As April sets, the average high-temperature shows an increase, moving up from a cool 52.3°F (11.3°C) in March to an enjoyable 64.9°F (18.3°C). Weather in April »
Weather in May
May, the last month of the spring in Potomac, is a warm month, with an average temperature ranging between max 74.3°F (23.5°C) and min 55.6°F (13.1°C). An increase in the average high-temperature marks May, moving from April's refreshing 64.9°F (18.3°C) to a moderately hot 74.3°F (23.5°C). Weather in May »
Weather in June
June, the first month of the summer in Potomac, is also a moderately hot month, with an average temperature fluctuating between 63.5°F (17.5°C) and 82.2°F (27.9°C). With the beginning of June, Potomac's average high-temperature sees a minor increase, transitioning from 74.3°F (23.5°C) in May to a still moderately hot 82.2°F (27.9°C). Weather in June »
Weather in July
July in Potomac, Maryland, is a tropical summer month, with an average temperature ranging between min 68.5°F (20.3°C) and max 87.4°F (30.8°C). Potomac's July weather reaches an average high of 87.4°F (30.8°C) and an average low of 68.5°F (20.3°C), making it the warmest month. The average heat index in July is calculated to be a very hot 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Potomac, Maryland, with temperature in the range of an average high of 85.5°F (29.7°C) and an average low of 67.3°F (19.6°C). Potomac, Maryland, experiences an average high-temperature of a moderately hot 85.5°F (29.7°C) in August, subtly different from July's 87.4°F (30.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Potomac, Maryland, with an average temperature fluctuating between 60.8°F (16°C) and 78.3°F (25.7°C). The onset of September is marked by a minor decrease in temperature, transitioning from 85.5°F (29.7°C) in August to a still warm 78.3°F (25.7°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Potomac, Maryland, with an average temperature ranging between min 49.8°F (9.9°C) and max 65.8°F (18.8°C). October brings a decrease in the average high-temperature, shifting from a warm 78.3°F (25.7°C) in September to a refreshing 65.8°F (18.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Potomac, is another cool month, with temperature in the range of an average high of 53.4°F (11.9°C) and an average low of 38.7°F (3.7°C). The onset of November results in a decrease in the average high-temperature, receding from a comfortable 65.8°F (18.8°C) in October to a fresh 53.4°F (11.9°C). Weather in November »
Weather in December
December, the first month of the winter in Potomac, is also a frosty month, with an average temperature ranging between min 32.9°F (0.5°C) and max 45.5°F (7.5°C). In December, the meteorological conditions change slightly, with the average high-temperature moving from a fresh 53.4°F (11.9°C) in November to a frosty 45.5°F (7.5°C). Weather in December »
[Resources]Frequently asked questions
What time of the year is the coldest in Potomac?
Potomac's coldest weather arrives in January, when temperatures average a high of 39.4°F (4.1°C) and a low of 26.4°F (-3.1°C).
How many days does it rain in Potomac?
Throughout the year, in Potomac, there are 156.5 rainfall days, and 30.71" (780mm) of precipitation is accumulated.
When does it snow in Potomac?
Months with snowfall in Potomac, Maryland, are January through April, November and December.
How much does it snow in Potomac?
In Potomac, during the entire year, snow falls for 15.5 days and aggregates up to 10.24" (260mm) of snow.
When is the lowest UV index in Potomac?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month in Potomac?
The month with the least rainfall in Potomac is February, when the rain falls for 9.3 days and typically collects 1.93" (49mm) of precipitation.
What is the month with the least sunshine in Potomac?
With an average of 5h of sunshine, February has the least sunshine of the year.
What is the snowiest month in Potomac?
The month with the most snowfall is March, when snow falls for 3.5 days and typically aggregates up to 3.03" (77mm) of snow.
When is Daylight Saving Time (DST) in Potomac?
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.
When it does not snow in Potomac?
May through October are months without snowfall in Potomac, Maryland.
When is the highest UV index in Potomac?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days in Potomac?
The month with the longest days in Potomac, Maryland, is June, with an average of 14h and 54min of daylight.
What is the warmest month in Potomac?
July, marked by an average high-temperature of 87.4°F (30.8°C) and a low-temperature of 68.5°F (20.3°C), is the warmest month in Potomac, Maryland.
What is the least humid month in Potomac?
July is the least humid month in Potomac, with an average relative humidity of 69%.
What month has the most sunshine in Potomac?
July has the most sunshine of the year in Potomac, Maryland, with an average of 10.8h of sunshine.
What is the wettest month in Potomac?
August is the month with the most rainfall in Potomac. Rain falls for 17.3 days and accumulates 3.86" (98mm) of precipitation.
What is the most humid month in Potomac?
October and December, with an average relative humidity of 76%, are most humid months.
What is the month with the shortest days in Potomac?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Potomac, MD
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.4°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure
Potomac, MD
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"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:
29.95"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Potomac, MD
- Average wind speed in January:
7.5mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.8mph - Average wind speed in April:
7.7mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.9mph
The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Potomac, MD
The months with the highest relative humidity are October and December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall
Potomac, MD
- Average rainfall in January:
1.97" - Average rainfall in February:
1.93" - Average rainfall in March:
2.28" - Average rainfall in April:
2.56" - Average rainfall in May:
3.19" - Average rainfall in June:
2.6"
- Average rainfall in July:
3.15" - Average rainfall in August:
3.86" - Average rainfall in September:
2.13" - Average rainfall in October:
2.4" - Average rainfall in November:
2.28" - Average rainfall in December:
2.36"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days
Potomac, MD
- Average rainfall days in January:
8.1 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
13.5 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
16.1 days - Average rainfall days in August:
17.3 days - Average rainfall days in September:
14.1 days - Average rainfall days in October:
12.1 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is January (8.1 days).
Average snowfall
Potomac, MD
The month with the highest snowfall is March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Potomac, MD
- Average snowfall days in January:
4.2 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
3.5 days - Average snowfall days in April:
0.2 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 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Potomac, MD
- 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 2min - 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 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 5min - Average sunshine in April:
8h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days
Potomac, MD
- Average sunshine days in January:
19.2 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14.7 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
11.7 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
12.6 days - Average sunshine days in August:
12.4 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.7 days).
Average UV index
Potomac, MD
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
Potomac, MD
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Potomac, MD
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).
Potomac, Maryland, USA
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