July weather forecastNorth Chelmsford, MA
July
Weather in July
July, like June, in North Chelmsford, Massachusetts, is a moderately hot summer month, with an average temperature fluctuating between 82.2°F (27.9°C) and 63.1°F (17.3°C).Temperature
North Chelmsford's July weather, marked by an average high temperature of 82.2°F (27.9°C) and an average low temperature of 63.1°F (17.3°C), is the warmest in the year.Heat index
In July, the heat index is appraised at a hot 87.8°F (31°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
The average relative humidity in July is 73%.Rainfall
In North Chelmsford, in July, during 15.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In North Chelmsford, Massachusetts, during the entire year, the rain falls for 145.9 days and collects up to 27.48" (698mm) of precipitation.Snowfall
In North Chelmsford, snow does not fall in June through September.Daylight
The average length of the day in July is 14h and 57min.On the first day of the month, sunrise is at 5:11 am and sunset at 8:27 pm. On the last day of July, sunrise is at 5:37 am and sunset at 8:06 pm EDT.
Sunshine
The average sunshine in July in North Chelmsford is 10.3h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 6 in July translates into this advice:
Fend off overexposure. Sun protection is vital. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
North Chelmsford, MA
- Average high temperature in July: 82.2°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in July: 63.1°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in July
North Chelmsford, MA
- Average pressure in July: 29.94"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in July
North Chelmsford, MA
- Average wind speed in July: 5.5mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in July
North Chelmsford, MA
- Average humidity in July: 73%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).
Average rainfall in July
North Chelmsford, MA
- Average rainfall in July: 2.05"
The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in July
North Chelmsford, MA
- Average rainfall days in July: 15.4 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in July
North Chelmsford, MA
- Average snowfall in July: 0"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
North Chelmsford, MA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
North Chelmsford, MA
- Average daylight in July: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in July: 10h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in July
North Chelmsford, MA
- Average sunshine days in July: 14.2 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in July
North Chelmsford, MA
- Average UV index in July: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in July
North Chelmsford, MA
- Average cloud cover in July: 34
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in July
North Chelmsford, MA
- Average visibility in July: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
