Climate and monthly weather forecastJohnsville, MD
Climate and monthly weather forecast
Weather in January
January, like December, in Johnsville, Maryland, is another cold winter month, with an average temperature ranging between min 25°F (-3.9°C) and max 37.6°F (3.1°C). January, with its average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 25°F (-3.9°C), holds the record as the coldest month. Weather in January »Weather in February
The last month of the winter, February, is another cold month in Johnsville, Maryland, with temperature in the range of an average high of 41.4°F (5.2°C) and an average low of 27.1°F (-2.7°C). Johnsville experiences a recorded average high-temperature of a still cold 41.4°F (5.2°C) in February, closely aligned with January's 37.6°F (3.1°C). Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Johnsville, Maryland, with temperature in the range of an average high of 50°F (10°C) and an average low of 34°F (1.1°C). Johnsville's transition into March brings a slight rise in the average high-temperature, moving from a cold 41.4°F (5.2°C) in February to a fresh 50°F (10°C). Weather in March »Weather in April
April is an enjoyable spring month in Johnsville, Maryland, with an average temperature varying between 43.7°F (6.5°C) and 62.2°F (16.8°C). Johnsville experiences a temperature shift with the start of April, with average high-temperatures moving from a fresh 50°F (10°C) in March to an enjoyable 62.2°F (16.8°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Johnsville, Maryland, with an average temperature varying between 53.8°F (12.1°C) and 71.8°F (22.1°C). The arrival of May signals an increase in the average high-temperature, moving from an enjoyable 62.2°F (16.8°C) in April to a pleasant 71.8°F (22.1°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Johnsville, Maryland, with an average temperature ranging between max 79.5°F (26.4°C) and min 61.3°F (16.3°C). As June arrives, Johnsville's weather shows a minor increase in high-temperatures, edging from May's agreeable 71.8°F (22.1°C) to a moderately hot 79.5°F (26.4°C). Weather in June »Weather in July
July, like June, in Johnsville, Maryland, is another warm summer month, with temperature in the range of an average high of 84.4°F (29.1°C) and an average low of 66.6°F (19.2°C). Johnsville, Maryland, experiences its highest temperatures in July, with an average peak of 84.4°F (29.1°C) and a low of 66.6°F (19.2°C). Throughout July, the heat index is computed to be a tropical 93.2°F (34°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Johnsville, Maryland, with an average temperature varying between 64.8°F (18.2°C) and 82.6°F (28.1°C). As Johnsville transitions into August, the average high-temperature stands at a still moderately hot 82.6°F (28.1°C), offering little variation from the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Johnsville, Maryland, with an average temperature fluctuating between 58.6°F (14.8°C) and 75.9°F (24.4°C). September brings a slight decrease in the average high-temperature, shifting from a warm 82.6°F (28.1°C) in August to a still moderately hot 75.9°F (24.4°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Johnsville, Maryland, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 64.2°F (17.9°C). Johnsville's October weather comes with a decrease in average high-temperatures, moving from a warm 75.9°F (24.4°C) in September to an enjoyable 64.2°F (17.9°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Johnsville, Maryland, with an average temperature fluctuating between 37°F (2.8°C) and 52.2°F (11.2°C). During Johnsville's transition into November, the average high-temperature lessens, moving from a refreshing 64.2°F (17.9°C) in October to a fresh 52.2°F (11.2°C). Weather in November »Weather in December
December, the first month of the winter in Johnsville, is still a chilly month, with an average temperature fluctuating between 31.3°F (-0.4°C) and 43.2°F (6.2°C). December's onset brings a negligible change in high-temperatures, falling from a fresh 52.2°F (11.2°C) in November to a chilly 43.2°F (6.2°C). Weather in December »Updated: Jul 18, 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 37.6°F (3.1°C) and an average low of 25°F (-3.9°C).
January, April, July and November, with an average relative humidity of 75%, are the least humid months.
In Johnsville, during the entire year, the rain falls for 130.3 days and collects up to 15.47" (393mm) of precipitation.
Months with snowfall are January through April, November and December.
January is the month with the most snowfall. Snow falls for 4.4 days and accumulates 1.34" (34mm) of snow.
In Johnsville, during the entire year, snow falls for 16 days and aggregates up to 4.13" (105mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.79" (20mm) of precipitation.
The month with the least sunshine is February, with an average of 4.7h of sunshine.
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.
The most humid month is May, with an average relative humidity of 80%.
In Johnsville, 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.
July registers as the month with the average highest temperatures, reaching 84.4°F (29.1°C) at its peak and 66.6°F (19.2°C) at the lowest.
With an average of 10.5h of sunshine, July has the most sunshine of the year.
August is the month with the most rainfall in Johnsville, Maryland. Rain falls for 15.1 days and accumulates 2.48" (63mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Johnsville, MD
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.6°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 (25°F).
Average pressure
Johnsville, MD
- Average pressure in January:
30.1"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:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"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 (29.94"Hg).
Average wind speed
Johnsville, MD
- Average wind speed in January:
8.6mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.7mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.9mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.5mph - Average wind speed in December:
8mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity
Johnsville, MD
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, April, July and November (75%).
Average rainfall
Johnsville, MD
- Average rainfall in January:
0.83" - Average rainfall in February:
0.79" - Average rainfall in March:
0.98" - Average rainfall in April:
1.18" - Average rainfall in May:
1.54" - Average rainfall in June:
1.42"
The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days
Johnsville, MD
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
9.5 days - Average rainfall days in April:
11.9 days - Average rainfall days in May:
14.7 days - Average rainfall days in June:
13.3 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
15.1 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is August (15.1 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall
Johnsville, MD
The month with the highest snowfall is January (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Johnsville, MD
- Average snowfall days in January:
4.4 days - Average snowfall days in February:
4.9 days - Average snowfall days in March:
3.4 days - Average snowfall days in April:
0.3 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:
2.5 days
The month with the highest number of snowfall days is February (4.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Johnsville, 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 6min - 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:
4h and 48min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 30min - Average sunshine in May:
8h and 24min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 36min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
Johnsville, MD
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
16.4 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
16.2 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
13.8 days
- Average sunshine days in July:
13.2 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
16.6 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20.9 days - Average sunshine days in December:
19.3 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (12.9 days).
Average UV index
Johnsville, 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
Johnsville, MD
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility
Johnsville, 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).
