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
July brings the highest temperatures, with an average high of 83.8°F (28.8°C) and an average low of 63.5°F (17.5°C).Heat index
July's mean heat index is appraised at a tropical 91.4°F (33°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.Always consider that heat index estimations are for light winds and places in the shade. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Humidity
The months with the lowest humidity are April and July, with an average relative humidity of 76%.Rainfall
In Mertztown, in July, it is raining for 15.4 days, with typically 2.87" (73mm) of accumulated precipitation. In Mertztown, during the entire year, the rain falls for 155.8 days and collects up to 30.75" (781mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Mertztown, the average length of the day in July is 14h and 44min.On the first day of July, sunrise is at 5:36 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 8:18 pm EDT.
Sunshine
The month with the most sunshine is July, with an average of 10.4h of sunshine.UV index
June and July, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 6 during July leads to these instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest?
How hot is July?
What is the least humid month?
What is the average humidity in July?
How many days does it rain in July in Mertztown?
When it does not snow?
How many hours of daylight does Mertztown have in July?
When are sunrise and sunset in July?
What month has the most sunshine?
How many hours of sunshine does Mertztown have in July?
When is the highest UV index?
What is the UV index reading in July in Mertztown?
Average temperature in July
Mertztown, PA
- Average high temperature in July: 83.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in July: 63.5°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in July
Mertztown, PA
- Average pressure in July: 29.96"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 in July
Mertztown, PA
- Average wind speed in July: 5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in July
Mertztown, PA
- Average humidity in July: 76%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in July
Mertztown, PA
- Average rainfall in July: 2.87"
The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in July
Mertztown, PA
- Average rainfall days in July: 15.4 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in July
Mertztown, PA
- Average snowfall in July: 0"
The month with the highest snowfall is March (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Mertztown, PA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Mertztown, PA
- Average daylight in July: 14h and 4min
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 July: 10h and 2min
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 24min).
Average sunshine days in July
Mertztown, PA
- Average sunshine days in July: 13.3 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in July
Mertztown, PA
- Average UV index in July: 6
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 in July
Mertztown, PA
- Average cloud cover in July: 33
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in July
Mertztown, PA
- Average visibility in July: 6mi
The months with the highest visibility are April, June, July and November (6mi).
The months with the lowest visibility are January, February, March, May, August, September, October and December (5mi).
Mertztown, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location