July weather forecastMerrimack, NH
July
Weather in July
July in Merrimack aces as the warmest month of the year, with average temperatures hitting the peaks. Choosing the right attire that complements the hot and humid weather becomes more critical at this time. Outdoor events and gatherings increasingly embrace late evenings to beat the heat. Interestingly, July features the peak of UV index 6, urging locals and tourists to take necessary precautions while stepping out. The town's markets also flourish with season-specific fruits and vegetables, joining the symphony of summer season.Temperature
In Merrimack, July is the month with the highest recorded average temperatures, measuring a high of 81.7°F (27.6°C) and a low of 61°F (16.1°C).Heat index
The average heat index in July is appraised at a tropical 86°F (30°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Humidity
In July, the average relative humidity in Merrimack, New Hampshire, is 75%.Rainfall
In Merrimack, New Hampshire, in July, it is raining for 11.9 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, in Merrimack, there are 104.4 rainfall days, and 12.95" (329mm) of precipitation is accumulated.Snowfall
In Merrimack, snow does not fall in June through September.Daylight
In Merrimack, the average length of the day in July is 14h and 58min.On the first day of July, sunrise is at 5:11 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:07 pm EDT.
Sunshine
In Merrimack, the average sunshine in July is 10.1h.UV index
The months with the highest UV index in Merrimack are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 6 in July translates into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Merrimack, NH
- Average high temperature in July: 81.7°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in July: 61°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in July
Merrimack, NH
- 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
Merrimack, NH
- Average wind speed in July: 5.2mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in July
Merrimack, NH
- Average humidity in July: 75%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in July
Merrimack, NH
- Average rainfall in July: 1.3"
The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in July
Merrimack, NH
- Average rainfall days in July: 11.9 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in July
Merrimack, NH
- Average snowfall in July: 0"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Merrimack, NH
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Merrimack, NH
- Average daylight in July: 15h and 0min
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 6min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in July
Merrimack, NH
- Average sunshine days in July: 17.1 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in July
Merrimack, NH
- 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
Merrimack, NH
- Average cloud cover in July: 35
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in July
Merrimack, NH
- Average visibility in July: 5mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
