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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 Riverdale Heights, Maryland, with temperature in the range of an average low of 27.7°F (-2.4°C) and an average high of 39.9°F (4.4°C). January, known for its average high temperature of 39.9°F (4.4°C) and an average low temperature of 27.7°F (-2.4°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Riverdale Heights, Maryland, with an average temperature ranging between max 44.2°F (6.8°C) and min 30°F (-1.1°C). The transition from January to February sees average high-temperatures adjusting to a frosty 44.2°F (6.8°C), from a not significantly different 39.9°F (4.4°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Riverdale Heights, Maryland, with an average temperature ranging between min 37.4°F (3°C) and max 52.3°F (11.3°C). The onset of March brings a minor temperature shift, with the average high-temperature moving from a frosty 44.2°F (6.8°C) in February to a cool 52.3°F (11.3°C). Weather in March »
Weather in April
April in Riverdale Heights, Maryland, is a comfortable spring month, with an average temperature ranging between min 47.3°F (8.5°C) and max 64.8°F (18.2°C). April indicates a change in the average high-temperature, moving up from a cool 52.3°F (11.3°C) in March to a comfortable 64.8°F (18.2°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Riverdale Heights, Maryland, with an average temperature varying between 57°F (13.9°C) and 73.9°F (23.3°C). In Riverdale Heights, the average high-temperature in May rises, from a comfortable 64.8°F (18.2°C) in April, to a warm 73.9°F (23.3°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Riverdale Heights, Maryland, with an average temperature fluctuating between 81.9°F (27.7°C) and 64.6°F (18.1°C). June showcases a minor temperature ascent, adjusting from May's 73.9°F (23.3°C) to a still warm 81.9°F (27.7°C). Weather in June »
Weather in July
July in Riverdale Heights, Maryland, is a tropical summer month, with an average temperature ranging between max 87.4°F (30.8°C) and min 70°F (21.1°C). July is the month that records the highest temperatures, with averages ranging from a high of 87.4°F (30.8°C) to a low of 70°F (21.1°C). July's mean heat index is appraised at a torrid 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Riverdale Heights, is also a moderately hot month, with an average temperature fluctuating between 85.1°F (29.5°C) and 68.7°F (20.4°C). August experiences an average high-temperature of a warm 85.1°F (29.5°C), barely different from July's 87.4°F (30.8°C). Weather in August »
Weather in September
September, the first month of the autumn in Riverdale Heights, is also a moderately hot month, with an average temperature fluctuating between 62.2°F (16.8°C) and 78.1°F (25.6°C). The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 85.1°F (29.5°C) in August to a still warm 78.1°F (25.6°C). Weather in September »
Weather in October
October, like September, in Riverdale Heights, Maryland, is another comfortable autumn month, with temperature in the range of an average low of 51.8°F (11°C) and an average high of 66.2°F (19°C). With October's onset, the weather shows a temperature decrease, transitioning from a warm 78.1°F (25.6°C) in September to an enjoyable 66.2°F (19°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Riverdale Heights, Maryland, with an average temperature ranging between max 54.1°F (12.3°C) and min 40.1°F (4.5°C). The arrival of November corresponds with a shift in temperature, down from a comfortable 66.2°F (19°C) in October to a cool 54.1°F (12.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Riverdale Heights, Maryland, with an average temperature fluctuating between 34.3°F (1.3°C) and 45.5°F (7.5°C). December signifies a gentle decline in Riverdale Heights's average high-temperature, easing from a fresh 54.1°F (12.3°C) in November to a frosty 45.5°F (7.5°C). Weather in December »
Updated: Jul 16, 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 time of the year is the coldest?
January is the coldest month, with the temperature often reaching an average high of 39.9°F (4.4°C) and an average low of 27.7°F (-2.4°C).
What is the driest month?
The month with the least rainfall is January, when the rain falls for 9.3 days and typically collects 2.01" (51mm) of precipitation.
How many days does it rain?
Throughout the year, there are 157.9 rainfall days, and 31.14" (791mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April and December.
When does it snow the most?
The month with the most snowfall is January, when snow falls for 4.1 days and typically aggregates up to 2.6" (66mm) of snow.
How many days does it snow in Riverdale Heights?
Throughout the year, there are 13.5 snowfall days, and 7.2" (183mm) of snow is accumulated.
When is the lowest UV index?
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Riverdale Heights, Maryland.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 5h of sunshine.
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 are the least humid months?
The months with the lowest humidity are April and July, with an average relative humidity of 71%.
What are the most humid months?
The months with the highest humidity are May, October and December, with an average relative humidity of 76%.
When it does not snow?
May through November are months without snowfall.
What are the months 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?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What part of the year is the hottest?
Riverdale Heights's temperatures peak on average in July, reaching 87.4°F (30.8°C) at their highest and 70°F (21.1°C) at their lowest.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.9h of sunshine.
What is the rainiest month?
August is the month with the most rainfall. Rain falls for 15.8 days and accumulates 3.58" (91mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Riverdale Heights, 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 (39.9°F).
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure
Riverdale Heights, 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:
29.94"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 (29.94"Hg).
Average wind speed
Riverdale Heights, MD
- Average wind speed in January:
7.9mph - Average wind speed in February:
8mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.2mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
6.1mph - Average wind speed in October:
6.9mph - Average wind speed in November:
7.2mph - Average wind speed in December:
7.3mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Riverdale Heights, MD
The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall
Riverdale Heights, MD
- Average rainfall in January:
2.01" - Average rainfall in February:
2.09" - Average rainfall in March:
2.36" - Average rainfall in April:
2.72" - Average rainfall in May:
2.99" - Average rainfall in June:
2.8"
- Average rainfall in July:
3.11" - Average rainfall in August:
3.58" - Average rainfall in September:
2.09" - Average rainfall in October:
2.64" - Average rainfall in November:
2.17" - Average rainfall in December:
2.6"
The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days
Riverdale Heights, MD
- Average rainfall days in January:
9.3 days - Average rainfall days in February:
10 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
17.9 days - Average rainfall days in June:
15.5 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.3 days - Average rainfall days in October:
11.8 days - Average rainfall days in November:
9 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).
Average snowfall
Riverdale Heights, MD
The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days
Riverdale Heights, MD
- Average snowfall days in January:
4.1 days - Average snowfall days in February:
3.9 days - Average snowfall days in March:
2.7 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:
0.2 days - Average snowfall days in December:
2.4 days
The month with the highest number of snowfall days is January (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Riverdale Heights, 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 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 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 2min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 5min - Average sunshine in December:
5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days
Riverdale Heights, MD
- Average sunshine days in January:
18.6 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
15.6 days - Average sunshine days in October:
17.4 days - Average sunshine days in November:
19.1 days - Average sunshine days in December:
18.1 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).
Average UV index
Riverdale Heights, 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 and December (UV index 2).
Average cloud cover
Riverdale Heights, MD
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility
Riverdale Heights, MD
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Riverdale Heights, Maryland, USA
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