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 months of July and August bring the highest temperatures, averaging a high of 84.6°F (29.2°C).Heat index
In July, the heat index is estimated at a hot 87.8°F (31°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.When assessing, remember that heat index measurements are for light winds and shaded spots. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The average relative humidity in July in Lewiston is 56%.Rainfall
The months with the least rainfall are July and August Rain falls for 3.1 days and accumulates 0.16" (4mm) of rain.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in July is 14h and 45min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:46 pm. On the last day of July, in Lewiston, sunrise is at 6:07 am and sunset at 8:27 pm PDT.
Sunshine
July has the most sunshine of the year in Lewiston, with an average of 12h of sunshine.UV index
July is the month with the highest UV index in Lewiston, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: In July, the maximum UV index of 6 translates into these guidelines:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Frequently asked questions
What is the hottest time of year in Lewiston?
How hot does it get in Lewiston in July?
What is the average humidity in July in Lewiston?
What is the driest month in Lewiston?
How much does it rain in Lewiston in July?
When it does not snow in Lewiston?
How many hours of daylight does Lewiston have in July?
When are sunrise and sunset in July in Lewiston?
What month has the most sunshine in Lewiston?
How many hours of sunshine does Lewiston have in July?
What is the month with the highest UV index in Lewiston?
What is the UV index reading in July in Lewiston?
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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