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 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
In July, the average high-temperature registers at a still warm 83.7°F (28.7°C), nearly identical to June's 78.4°F (25.8°C). An average low-temperature of 63.1°F (17.3°C) is noted during the nights in July.Heat index
The heat index in July is computed to be a tropical 87.8°F (31°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In July, the average relative humidity is 60%.Rainfall
In Johnstown, during July, the rain falls for 5 days and regularly aggregates up to 0.35" (9mm) of precipitation. Throughout the year, there are 49.6 rainfall days, and 5.16" (131mm) of precipitation is accumulated.Daylight
In Johnstown, the average length of the day in July is 14h and 4min.On the first day of July, sunrise is at 5:43 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:46 pm PDT.
Sunshine
The months with the most sunshine are June and July, with an average of 12.1h of sunshine.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 6 in July, converts into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Johnstown during July?
What is the average humidity in July?
How many days does it rain in July in Johnstown?
What is the average length of the day in July?
When are sunrise and sunset in July?
What are the months with the most sunshine in Johnstown?
How many hours of sunshine does Johnstown have in July?
What are the months with the highest UV index?
What is the UV index reading in July?
Average temperature in July
Johnstown, CA
- Average high temperature in July: 83.7°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in July: 63.1°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in July
Johnstown, CA
- Average pressure in July: 29.89"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in July
Johnstown, CA
- Average wind speed in July: 4.5mph
The windiest months (with the highest average wind speed) are April and May (5.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.2mph).
Average humidity in July
Johnstown, CA
- Average humidity in July: 60%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in July
Johnstown, CA
- Average rainfall in July: 0.35"
The wettest month (with the highest rainfall) is February (1.06").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in July
Johnstown, CA
- Average rainfall days in July: 5 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in July /
Average sunshine in July
Johnstown, CA
- Average daylight in July: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in July: 12h and 1min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in July
Johnstown, CA
- Average sunshine days in July: 20.7 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is July (20.7 days).
Average UV index in July
Johnstown, CA
- Average UV index in July: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in July
Johnstown, CA
- Average cloud cover in July: 8
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in July
Johnstown, CA
- Average visibility in July: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Johnstown, California, USA
Weather forecast for your location
2. Allow the app to use your location