Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
The warmest period is July, when temperatures fluctuate between an average high of 82.2°F (27.9°C) and a low of 63.1°F (17.3°C).Heat index
In July, the average heat index is appraised at a tropical 87.8°F (31°C). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.Always consider that heat index estimations are for light winds and places in the shade. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
In July, the average relative humidity in Chelmsford, Massachusetts, is 73%.Rainfall
In Chelmsford, during July, the rain falls for 15.4 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Chelmsford, Massachusetts, during the entire year, the rain falls for 145.9 days and collects up to 27.48" (698mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Chelmsford, the average length of the day in July is 14h and 56min.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
In Chelmsford, the average sunshine in July is 10.3h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: In July, an average UV index of 6 transforms into the following instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Frequently asked questions
What part of the year is the hottest in Chelmsford?
What is the usual temperature for Chelmsford in July?
What is the average humidity in July in Chelmsford?
How many days does it rain in July in Chelmsford?
When it does not snow in Chelmsford?
How many hours of daylight does Chelmsford have in July?
What time are sunrise and sunset in July in Chelmsford?
How long on average sun shines in July in Chelmsford?
When is the highest UV index in Chelmsford?
What is the UV index reading in July in Chelmsford?
Average temperature in July
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
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
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
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
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
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
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
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
Chelmsford, MA
- Average daylight in July: 14h and 5min
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 2min
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
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
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
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
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).
Chelmsford, Massachusetts, USA
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