Climate and monthly weather forecastJefferson, MD
Climate and monthly weather forecast
Weather in January
January, the same as December, is another cold winter month in Jefferson, Maryland, with an average temperature ranging between max 40.5°F (4.7°C) and min 27.1°F (-2.7°C). January proves to be the coldest month, recording an average maximum temperature of 40.5°F (4.7°C) and a minimum temperature of 27.1°F (-2.7°C). Weather in January »Weather in February
The last month of the winter, February, is a chilly month in Jefferson, Maryland, with an average temperature fluctuating between 44.6°F (7°C) and 29.7°F (-1.3°C). As Jefferson transitions from January to February, the average high-temperatures adjust to a frosty 44.6°F (7°C), nearly the same as the previous 40.5°F (4.7°C). Weather in February »Weather in March
The first month of the spring, March, is a cool month in Jefferson, Maryland, with an average temperature fluctuating between 52.9°F (11.6°C) and 36.9°F (2.7°C). With the onset of March, Jefferson's average high-temperature sees a modest rise, moving from February's frosty 44.6°F (7°C) to a fresh 52.9°F (11.6°C). Weather in March »Weather in April
April in Jefferson, Maryland, is a refreshing spring month, with an average temperature fluctuating between 65.3°F (18.5°C) and 46.9°F (8.3°C). The onset of April brings a rise in the average high-temperature, elevating from a fresh 52.9°F (11.6°C) in March to an enjoyable 65.3°F (18.5°C). Weather in April »Weather in May
May, the last month of the spring in Jefferson, is a warm month, with an average temperature ranging between min 56.7°F (13.7°C) and max 74.8°F (23.8°C). The start of May signals an increase in the average high-temperature, moving from a refreshing 65.3°F (18.5°C) in April to a warm 74.8°F (23.8°C). Weather in May »Weather in June
June, the first month of the summer in Jefferson, is also a moderately hot month, with an average temperature varying between 63.9°F (17.7°C) and 82.9°F (28.3°C). June's arrival brings a slight change in high-temperatures, adjusting from 74.8°F (23.8°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »Weather in July
July in Jefferson, Maryland, is a tropical summer month, with an average temperature varying between 87.6°F (30.9°C) and 69.1°F (20.6°C). July is Jefferson's warmest month, registering average high temperatures of 87.6°F (30.9°C) and lows of 69.1°F (20.6°C). The heat index value for July is evaluated at a torrid 100.4°F (38°C). Weather in July »Weather in August
August, the last month of the summer in Jefferson, is also a moderately hot month, with an average temperature ranging between max 85.6°F (29.8°C) and min 67.3°F (19.6°C). The beginning of August records an average high-temperature of a warm 85.6°F (29.8°C), marking a negligible difference from July's 87.6°F (30.9°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Jefferson, Maryland, with an average temperature fluctuating between 61.3°F (16.3°C) and 78.6°F (25.9°C). September is characterized by a mild reduction in the average high-temperature, from a warm 85.6°F (29.8°C) in August to a still moderately hot 78.6°F (25.9°C). Weather in September »Weather in October
October, like September, in Jefferson, Maryland, is another comfortable autumn month, with an average temperature fluctuating between 66.4°F (19.1°C) and 50.2°F (10.1°C). During the transition into October, Jefferson observes a decrease in the average high-temperature, falling from a warm 78.6°F (25.9°C) in September to a refreshing 66.4°F (19.1°C). Weather in October »Weather in November
November, the last month of the autumn in Jefferson, is another cool month, with temperature in the range of an average low of 39.2°F (4°C) and an average high of 54.5°F (12.5°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's refreshing 66.4°F (19.1°C) to a fresh 54.5°F (12.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Jefferson, Maryland, with an average temperature varying between 33.1°F (0.6°C) and 45.5°F (7.5°C). A decrease in the average high-temperature is observed during December, shifting from a cool 54.5°F (12.5°C) in November to a chilly 45.5°F (7.5°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
January is the coldest month, with the temperature often reaching an average high of 40.5°F (4.7°C) and an average low of 27.1°F (-2.7°C).
The month with the least rainfall is January, when the rain falls for 9.8 days and typically collects 2.05" (52mm) of precipitation.
In Jefferson, during the entire year, the rain falls for 161.2 days and collects up to 31.54" (801mm) of precipitation.
January through April, November and December are months with snowfall in Jefferson.
January is the month with the most snowfall. Snow falls for 4.9 days and accumulates 3.31" (84mm) of snow.
Throughout the year, there are 16.1 snowfall days, and 10.39" (264mm) of snow is accumulated.
The months with the least sunshine are January, February and December, with an average of 5.2h of sunshine.
The months with the lowest UV index are January, November and December, with an average maximum UV index of 2.
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.
April and July, with an average relative humidity of 71%, are the least humid months.
In Jefferson, snow does not fall in May through October.
May through August, with an average maximum UV index of 6, are months with the highest UV index.
June has the longest days of the year, with an average of 14h and 54min of daylight.
With an average high-temperature of 87.6°F (30.9°C) and an average low-temperature of 69.1°F (20.6°C), July is the warmest month.
July has the most sunshine of the year, with an average of 10.9h of sunshine.
August is the month with the most rainfall. Rain falls for 17.2 days and accumulates 3.78" (96mm) of precipitation.
The most humid month is October, with an average relative humidity of 77%.
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Jefferson, MD
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (40.5°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure
Jefferson, MD
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"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
Jefferson, MD
- Average wind speed in January:
7.2mph - Average wind speed in February:
7.3mph - Average wind speed in March:
7.6mph - Average wind speed in April:
7.5mph - Average wind speed in May:
6.2mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
4.9mph - Average wind speed in August:
4.8mph - Average wind speed in September:
5.4mph - Average wind speed in October:
6.3mph - Average wind speed in November:
6.6mph - Average wind speed in December:
6.6mph
The windiest month (with the highest average wind speed) is March (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity
Jefferson, MD
The month with the highest relative humidity is October (77%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall
Jefferson, MD
- Average rainfall in January:
2.05" - Average rainfall in February:
2.09" - Average rainfall in March:
2.4" - Average rainfall in April:
2.8" - Average rainfall in May:
3.15" - Average rainfall in June:
2.6"
- Average rainfall in July:
3.03" - Average rainfall in August:
3.78" - Average rainfall in September:
2.09" - Average rainfall in October:
2.6" - Average rainfall in November:
2.28" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days
Jefferson, MD
- Average rainfall days in January:
9.8 days - Average rainfall days in February:
10 days - Average rainfall days in March:
14 days - Average rainfall days in April:
15.7 days - Average rainfall days in May:
18.2 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
17.2 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
10.8 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (8.9 days).
Average snowfall
Jefferson, MD
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Jefferson, MD
- Average snowfall days in January:
4.9 days - Average snowfall days in February:
4.7 days - Average snowfall days in March:
3.2 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:
0.5 days - Average snowfall days in December:
2.6 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Jefferson, MD
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 24min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
5h and 12min - Average sunshine in March:
6h and 54min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 18min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 12min).
Average sunshine days
Jefferson, MD
- Average sunshine days in January:
17.9 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
11.6 days - Average sunshine days in September:
15.6 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
19.2 days - Average sunshine days in December:
17.4 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (10.9 days).
Average UV index
Jefferson, 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, November and December (UV index 2).
Average cloud cover
Jefferson, MD
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Jefferson, 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).
