July weather forecastNapa Junction, CA
July
Weather in July
July, like June, in Napa Junction, California, is a moderately hot summer month, with an average temperature ranging between min 55.8°F (13.2°C) and max 82.6°F (28.1°C).Temperature
In Napa Junction, the average temperatures in July are the highest, with a peak at 82.6°F (28.1°C) and a low of 55.8°F (13.2°C).Heat index
For most parts of July, the heat index is evaluated at a tropical 86°F (30°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. 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 extremely significant for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humidity
In Napa Junction, the average relative humidity in July is 61%.Rainfall
The months with the least rainfall are July and August Rain falls for 1.3 days and accumulates 0.04" (1mm) of rain.Daylight
In July, the average length of the day in Napa Junction is 14h and 31min.On the first day of July in Napa Junction, California, sunrise is at 5:49 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 8:19 pm PDT.
Sunshine
The months with the most sunshine in Napa Junction are July and August, with an average of 12h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 6 in July translates into the following instructions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Napa Junction, CA
- Average high temperature in July: 82.6°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (54.9°F).
- Average low temperature in July: 55.8°F
The month with the highest average low temperature is August (56.5°F).
The coldest months (with the lowest average low temperature) are January and December (42.3°F).
Average pressure in July
Napa Junction, CA
- Average pressure in July: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in July
Napa Junction, CA
- Average wind speed in July: 6mph
The windiest month (with the highest average wind speed) is May (6.6mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in July
Napa Junction, CA
- Average humidity in July: 61%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (58%).
Average rainfall in July
Napa Junction, CA
- Average rainfall in July: 0.04"
The wettest month (with the highest rainfall) is February (2.32").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in July
Napa Junction, CA
- Average rainfall days in July: 1.3 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is August (0.9 days).
Average daylight in July /
Average sunshine in July
Napa Junction, CA
- Average daylight in July: 14h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in July: 12h and 0min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in July
Napa Junction, CA
- Average sunshine days in July: 29.1 days
The months with the most sunshine days are July and August (29.1 days).
The month with the least sunshine days is March (18.3 days).
Average UV index in July
Napa Junction, CA
- 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, November and December (UV index 3).
Average cloud cover in July
Napa Junction, CA
- Average cloud cover in July: 7
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in July
Napa Junction, 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).
