Lewiston (ID)
July
Weather in Lewiston, Idaho for July 2026
Your guide to Lewiston weather in July - trends and predictions
In general, the average temperature in Lewiston at the beginning of July is 31.1 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 33.7 °F by the end of July.
Precipitation in Lewiston during July is a rare event, with an average of fewer than 2 rainy days.
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Temperatures
Rain 🌧️
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31
Dry days
0
Rainy days
0
Snow days
32°/14°
Temperatures
20 km/h
Avg max wind
41 %
Avg humidity
Lewiston Weather July
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Temperatures trend during July in Lewiston
See the weather trend as well as the moving average line
July weather in Lewiston day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Partly cloudy | 37° /15° | 0 mm | 9 | |
| Jul. 2 | Partly cloudy | 34° /17° | 0 mm | 8 | |
| Jul. 3 |  Sunny | 28° /10° | 0 mm | 7 | |
| Jul. 4 |  Overcast | 28° /12° | 0 mm | 6 | |
| Jul. 5 | Overcast | 26° /11° | 0 mm | 6 | |
| Jul. 6 | Sunny | 31° /10° | 0 mm | 8 | |
| Jul. 7 | Sunny | 34° /12° | 0 mm | 8 | |
| Jul. 8 |  Thundery outbreaks possible | 38° /16° | 0 mm | 8 | |
| Jul. 9 | Partly cloudy | 31° /15° | 0 mm | 8 | |
| Jul. 10 | Partly cloudy | 26° /13° | 0 mm | 7 | |
| Jul. 11 | Sunny | 31° /14° | 0 mm | 8 | |
| Jul. 12 | Sunny | 34° /16° | 0 mm | 8 | |
| Jul. 13 | Sunny | 37° /15° | 0 mm | 9 | |
| Jul. 14 | Sunny | 35° /16° | 0 mm | 9 | |
| Jul. 15 | Sunny | 27° /12° | 0 mm | 7 | |
| Jul. 16 | Sunny | 31° /10° | 0 mm | 8 | |
| Jul. 17 | Sunny | 34° /15° | 0 mm | 8 | |
| Jul. 18 | Sunny | 35° /15° | 0 mm | 9 | |
| Jul. 19 | Overcast | 30° /18° | 0 mm | 6 | |
| Jul. 20 | Overcast | 25° /17° | 0 mm | 6 | |
| Jul. 21 | Thundery outbreaks possible | 24° /17° | 0 mm | 5 | |
| Jul. 22 | Overcast | 25° /13° | 0 mm | 6 | |
| Jul. 23 | Sunny | 32° /13° | 0 mm | 8 | |
| Jul. 24 | Sunny | 35° /15° | 0 mm | 9 | |
| Jul. 25 | Sunny | 32° /12° | 0 mm | 8 | |
| Jul. 26 | Sunny | 30° /14° | 0 mm | 8 | |
| Jul. 27 | Sunny | 31° /12° | 0 mm | 8 | |
| Jul. 28 |  Cloudy | 33° /14° | 0 mm | 7 | |
| Jul. 29 | Sunny | 38° /17° | 0 mm | 9 | |
| Jul. 30 | Overcast | 36° /18° | 0 mm | 8 | |
| Jul. 31 | Thundery outbreaks possible | 36° /20° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Lewiston in July is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Lewiston forecast closer to your planned date for the most up-to-date weather information.
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Lewiston in July - FAQ
What are the expected maximum and minimum temperatures in Lewiston during July?
Expect warm days with temperatures around 32°, cooling to mild conditions of 14° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Lewiston during July?
Rainfall in Lewiston during July is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Lewiston during July?
The average wind speed in Lewiston during July is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
UV exposure in Lewiston during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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