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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 Harrow, Pennsylvania, is a wintry winter month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 34.9°F (1.6°C). Harrow notes the coldest temperatures in January, with a high average of 34.9°F (1.6°C) and a low of 22.5°F (-5.3°C). Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Harrow, Pennsylvania, with an average temperature varying between 23.9°F (-4.5°C) and 38.7°F (3.7°C). With the onset of February, Harrow's average high-temperature clocks in at a still cold 38.7°F (3.7°C), showing a minor fluctuation from the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Harrow, Pennsylvania, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 46.9°F (8.3°C). March marks a minor ascent in the average high-temperature, adjusting from February's cold 38.7°F (3.7°C) to a frosty 46.9°F (8.3°C). Weather in March »
Weather in April
April in Harrow, Pennsylvania, is a refreshing spring month, with an average temperature ranging between min 41.4°F (5.2°C) and max 59.5°F (15.3°C). The average high-temperature increases in April, moving from a frosty 46.9°F (8.3°C) in March to a moderate 59.5°F (15.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Harrow, Pennsylvania, with temperature in the range of an average high of 69.8°F (21°C) and an average low of 51.1°F (10.6°C). With the transition into May, Harrow experiences an increase in average high-temperatures, moving up from a refreshing 59.5°F (15.3°C) in April to a pleasant 69.8°F (21°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Harrow, Pennsylvania, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 77.5°F (25.3°C). A gentle upsurge in temperatures occurs as May gives way to June, with average highs shifting from a pleasant 69.8°F (21°C) to a warm 77.5°F (25.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Harrow, Pennsylvania, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 83.8°F (28.8°C). In Harrow, the peak temperatures are generally noted in July, averaging a high of 83.8°F (28.8°C) and a low of 64°F (17.8°C). The heat index value for July is evaluated at a hot 91.4°F (33°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Harrow, Pennsylvania, with temperature in the range of an average low of 62.2°F (16.8°C) and an average high of 81.7°F (27.6°C). Harrow, Pennsylvania, transitions into August recording an average high-temperature of a still moderately hot 81.7°F (27.6°C), closely aligning with the preceding month's temperature. Weather in August »
Weather in September
September, the first month of the autumn in Harrow, is still a warm month, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 55.6°F (13.1°C). The shift from August to September coincides with a small decrease in the average high-temperature, down to a still moderately hot 75.4°F (24.1°C) from 81.7°F (27.6°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Harrow, Pennsylvania, with an average temperature varying between 46.2°F (7.9°C) and 63°F (17.2°C). With October's arrival, Harrow sees a decrease in average high-temperatures, moving from a warm 75.4°F (24.1°C) in September to a comfortable 63°F (17.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Harrow, is another cool month, with an average temperature ranging between min 35.6°F (2°C) and max 50.2°F (10.1°C). Harrow in November experiences a subtle temperature decline, with average high-temperatures reducing from a refreshing 63°F (17.2°C) in October to a cool 50.2°F (10.1°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Harrow, Pennsylvania, with an average temperature ranging between min 29.1°F (-1.6°C) and max 40.8°F (4.9°C). The commencement of December indicates a shift in the average high-temperature, receding from November's cool 50.2°F (10.1°C) to a cold 40.8°F (4.9°C). Weather in December »
Updated: Feb 13, 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 month is the coldest in Harrow?
Harrow's January weather, with an average high temperature of 34.9°F (1.6°C) and an average low temperature of 22.5°F (-5.3°C), tends to be the coldest of the year.
How much does it rain in Harrow?
Throughout the year, there are 91.3 rainfall days, and 7.28" (185mm) of precipitation is accumulated.
When does it snow in Harrow?
Months with snowfall are January through May, November and December.
How much does it snow in Harrow?
In Harrow, during the entire year, snow falls for 14.8 days and aggregates up to 2.24" (57mm) of snow.
What are the months with the lowest UV index in Harrow?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Harrow.
What is the most humid month in Harrow?
With an average relative humidity of 81%, February is the most humid month.
What is the month with the least sunshine in Harrow?
With an average of 4.5h of sunshine, February has the least sunshine of the year in Harrow, Pennsylvania.
What is the snowiest month in Harrow?
The month with the most snowfall is March, when snow falls for 3.5 days and typically aggregates up to 0.63" (16mm) of snow.
When is Daylight Saving Time (DST) in Harrow?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Harrow, Pennsylvania, 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 in Harrow?
The months with the lowest humidity are April and July, with an average relative humidity of 76%.
When it does not snow in Harrow?
June through October are months without snowfall in Harrow, Pennsylvania.
When are the longest days in Harrow?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What are the months with the highest UV index in Harrow?
June and July, with an average maximum UV index of 6, are months with the highest UV index in Harrow, Pennsylvania.
What is the warmest month in Harrow?
July, recording an average high temperature of 83.8°F (28.8°C) and a low temperature of 64°F (17.8°C), is Harrow's warmest month.
What is the rainiest month in Harrow?
The month with the most rainfall in Harrow, Pennsylvania, is July, when the rain falls for 10.2 days and typically aggregates up to 0.91" (23mm) of precipitation.
What month has the most sunshine in Harrow?
July has the most sunshine of the year in Harrow, with an average of 10.4h of sunshine.
What is the driest month in Harrow?
The month with the least rainfall in Harrow, Pennsylvania, is September, when the rain falls for 7.1 days and typically collects 0.28" (7mm) of precipitation.
What is the month with the shortest days in Harrow?
With an average of 9h and 18min of daylight, December has the shortest days of the year in Harrow.
Average temperature
Harrow, PA
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure
Harrow, PA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Harrow, PA
- Average wind speed in January:
8.1mph - Average wind speed in February:
8mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8mph - Average wind speed in May:
6.4mph - Average wind speed in June:
5.9mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5mph - Average wind speed in September:
5.6mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.6mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Harrow, PA
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall
Harrow, PA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.43" - Average rainfall in March:
0.55" - Average rainfall in April:
0.55" - Average rainfall in May:
0.75" - Average rainfall in June:
0.67"
- Average rainfall in July:
0.91" - Average rainfall in August:
0.71" - Average rainfall in September:
0.28" - Average rainfall in October:
0.63" - Average rainfall in November:
0.59" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is July (0.91").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days
Harrow, PA
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
8.9 days - Average rainfall days in May:
10.1 days - Average rainfall days in June:
10.2 days
- Average rainfall days in July:
10.2 days - Average rainfall days in August:
9.8 days - Average rainfall days in September:
7.1 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
4.4 days - Average rainfall days in December:
5.8 days
The months with the highest number of rainy days are June and July (10.2 days).
The month with the least rainy days is January (4.3 days).
Average snowfall
Harrow, PA
- Average snowfall in January:
0.35" - Average snowfall in February:
0.31" - Average snowfall in March:
0.63" - Average snowfall in April:
0.04" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is March (0.63").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Harrow, PA
- Average snowfall days in January:
3.6 days - Average snowfall days in February:
4.2 days - Average snowfall days in March:
3.5 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.1 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:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
2.2 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Harrow, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - 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:
15h and 0min
- 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:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 3min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days
Harrow, PA
- Average sunshine days in January:
23.8 days - Average sunshine days in February:
19.9 days - Average sunshine days in March:
20.2 days - Average sunshine days in April:
19.9 days - Average sunshine days in May:
17.3 days - Average sunshine days in June:
16.7 days
- Average sunshine days in July:
17.2 days - Average sunshine days in August:
19.1 days - Average sunshine days in September:
20.2 days - Average sunshine days in October:
20.8 days - Average sunshine days in November:
23.6 days - Average sunshine days in December:
22.8 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is June (16.7 days).
Average UV index
Harrow, PA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Harrow, PA
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility
Harrow, PA
The months with the highest visibility are January, February, March, April, November and December (6mi).
The months with the lowest visibility are May, June, July, August, September and October (5mi).
Harrow, Pennsylvania, USA
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