Green River weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Green River in September. Check more long-term weather averages for Green River in September before you book your next holiday to Wyoming in 2025/2026.

  • 21°C maximum daytime temperature in September in Green River21
    21°C max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in September in Green River7
    7 days with some rainfall
  • 2°C minimum night-time temperature in September in Green River2
    2°C min night temperature
  • 12 hours of daylight per day in September in Green River12
    12 hours of daylight per day
  • No heat & humidity in September in Green River0
    No heat & humidity
  • 21 mm monthly rainfall in September in Green River21
    21 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Green River7
    7 (High) UV index

More about Green River

Green River by month

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

Recommended for Wyoming

Avalon Waterways: Current offers on 2024 river cruises

  • Save on river cruises in 2024 with Avalon Waterways
  • Book river cruises in Europe, Asia, Africa & Americas
  • Filter deals by promotion, month, destination & more
Go to Avalon Waterways deal >>

Expires at 23:59 on Tuesday 31st Dec 2024 · View all Avalon Waterways offers

The September weather guide for Wyoming (Green River) 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 / mm)  |  Imperial (°F / inches)

Back to top

More about the USA

How hot is it in Green River in September?

Daytime temperatures usually reach 21°C in Green River in September, falling to 2°C at night.

How sunny is it in Green River in September?

There are normally 9 hours of bright sunshine each day in Green River in September - that's 74% of daylight hours.

Does it rain in Green River in September?

There are usually 7 days with some rain in Green River in September and the average monthly rainfall is 21mm.

Green River September sunrise & sunset times

Browse the sunrise and sunset times for Green River in September 2025. Select a month to view Green River sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:44 18:50
Monday, 15th September 2025 05:59 18:26
Tuesday, 30th September 2025 06:14 18:01

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^