Lewiston weather in July 2026

Expect daytime maximum temperatures of 88°F in Lewiston, Idaho in July based on long-term weather averages. There are 14 hours of sunshine per day on average.

  • 88°F maximum daytime temperature in July in Lewiston88
    88°F max day temperature
  • 14 hours of sunshine per day
  • 5 days with some rainfall in July in Lewiston5
    5 days with some rainfall
  • 55°F minimum night-time temperature in July in Lewiston55
    55°F min night temperature
  • 15 hours of daylight per day in July in Lewiston15
    15 hours of daylight per day
  • Moderate heat & humidity in July in LewistonM
    Moderate heat & humidity
  • 0.7 inches monthly rainfall in July in Lewiston0.7
    0.7 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in July in Lewiston8
    8 (Very High) UV index

More about Lewiston

Lewiston by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Idaho

Cosmos: up to £900 savings on 2026 tours

  • Save up to £900 per couple on 2026 tours worldwide
  • Discount varies by destination. T&Cs apply
  • Travel between 1st Jan & 31st Dec 2026 (inclusive)
Go to Cosmos deal >>

Expires at 23:59 on Tuesday 30th Sep 2025 · View all Cosmos offers

CosmosTour deal finder

The July weather guide for Idaho (Lewiston) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

Back to top

More about the USA

How hot is it in Lewiston in July?

Daytime temperatures usually reach 88°F in Lewiston in July with moderate heat and humidity, falling to 55°F at night.

How sunny is it in Lewiston in July?

There are normally 14 hours of bright sunshine each day in Lewiston in July - that's 90% of daylight hours.

Does it rain in Lewiston in July?

There are usually 5 days with some rain in Lewiston in July and the average monthly rainfall is 0.7 inches.

Lewiston July sunrise & sunset times

Browse the sunrise and sunset times for Lewiston in July 2026. Select a month to view Lewiston sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st July 2026 04:00 19:44
Thursday, 16th July 2026 04:12 19:36
Friday, 31st July 2026 04:28 19:20

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^