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, with an average high-temperature of 84.6°F (29.2°C), falls in July and August.Heat index
The average heat index in July is evaluated at a hot 87.8°F (31°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.For clarity, heat index numbers account for light winds and areas under shade. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
The average relative humidity in July is 56%.Rainfall
July and August are months with the least rain when the rain falls for 3.1 days and typically aggregates up to 0.16" (4mm) of rain.Snowfall
May through October are months without snowfall.Daylight
In July, the average length of the day is 14h and 45min.On the first day of July, sunrise is at 5:44 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 8:27 pm PDT.
Sunshine
July has the most sunshine of the year, with an average of 12h of sunshine.UV index
The month with the highest UV index is July, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 6 in July transforms into this advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the hottest time of year?
How hot does it get in July?
What is the average humidity in July?
What is the driest month?
How much does it rain in July?
When it does not snow in Lewiston?
How many hours of daylight does Lewiston have in July?
What time are sunrise and sunset in July?
What month has the most sunshine?
How many hours of sunshine does Lewiston have in July?
What is the month with the highest UV index?
How high is the UV index in July?
Average temperature in July
Lewiston, CA
- Average high temperature in July: 84.6°F
The warmest months (with the highest average high temperature) are July and August (84.6°F).
The month with the lowest average high temperature is December (45°F).
- Average low temperature in July: 51.3°F
The month with the highest average low temperature is July (51.3°F).
The coldest month (with the lowest average low temperature) is December (30°F).
Average pressure in July
Lewiston, CA
- Average pressure in July: 29.95"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in July
Lewiston, CA
- Average wind speed in July: 3.6mph
The windiest months (with the highest average wind speed) are March and April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in July
Lewiston, CA
- Average humidity in July: 56%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (54%).
Average rainfall in July
Lewiston, CA
- Average rainfall in July: 0.16"
The wettest month (with the highest rainfall) is December (6.14").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in July
Lewiston, CA
- Average rainfall days in July: 3.1 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in July
Lewiston, CA
- Average snowfall in July: 0"
The month with the highest snowfall is February (8.35").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in July
Lewiston, CA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in July /
Average sunshine in July
Lewiston, CA
- 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: 12h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in July
Lewiston, CA
- Average sunshine days in July: 25.8 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index in July
Lewiston, CA
- Average UV index in July: 6
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in July
Lewiston, CA
- Average cloud cover in July: 9
The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in July
Lewiston, CA
- Average visibility in July: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are March and December (4mi).
Lewiston, California, USA
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