Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Lewiston sees its peak of temperatures during July and August, with an average high-temperature of 84.6°F (29.2°C).Heat index
For most parts of August, the heat index is estimated at a tropical 86°F (30°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Records show heat index calculations are tailored for shaded regions and mild winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The least humid month in Lewiston, California, is August, with an average relative humidity of 54%.Rainfall
The months with the least rainfall in Lewiston are July and August Rain falls for 2.5 days and accumulates 0.16" (4mm) of rain.Snowfall
May through October are months without snowfall.Daylight
In August, the average length of the day is 13h and 44min.On the first day of the month, sunrise is at 6:08 am and sunset at 8:26 pm. On the last day of August, sunrise is at 6:38 am and sunset at 7:44 pm PDT.
Sunshine
In August, the average sunshine is 11.9h.UV index
The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 5 in August translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the warmest month in Lewiston?
How hot is it in Lewiston in August?
What is the least humid month in Lewiston?
What is the average humidity in August in Lewiston?
What is the driest month in Lewiston?
How much does it rain in Lewiston in August?
When it does not snow in Lewiston?
What is the average length of the day in August in Lewiston?
When are sunrise and sunset in August in Lewiston?
How long on average sun shines in August in Lewiston?
What is the UV index reading in August in Lewiston?
Average temperature in August
Lewiston, CA
- Average high temperature in August: 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 August: 50.7°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 August
Lewiston, CA
- Average pressure in August: 29.94"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 August
Lewiston, CA
- Average wind speed in August: 3.4mph
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 August
Lewiston, CA
- Average humidity in August: 54%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is August (54%).
Average rainfall in August
Lewiston, CA
- Average rainfall in August: 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 August
Lewiston, CA
- Average rainfall days in August: 2.5 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 August
Lewiston, CA
- Average snowfall in August: 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 August
Lewiston, CA
- Average snowfall days in August: 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 August /
Average sunshine in August
Lewiston, CA
- Average daylight in August: 13h 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 August: 11h and 5min
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 August
Lewiston, CA
- Average sunshine days in August: 26.8 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 August
Lewiston, CA
- Average UV index in August: 5
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 August
Lewiston, CA
- Average cloud cover in August: 8
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 August
Lewiston, CA
- Average visibility in August: 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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