Keystone weather in July 2025

Expect 29°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Keystone in July. Check more long-term weather averages for Keystone in July before you book your next holiday to South Dakota in 2025/2026.

  • 29°C maximum daytime temperature in July in Keystone29
    29°C max day temperature
  • 11 hours of sunshine per day
  • 10 days with some rainfall in July in Keystone10
    10 days with some rainfall
  • 13°C minimum night-time temperature in July in Keystone13
    13°C min night temperature
  • 15 hours of daylight per day in July in Keystone15
    15 hours of daylight per day
  • Moderate heat & humidity in July in KeystoneM
    Moderate heat & humidity
  • 61 mm monthly rainfall in July in Keystone61
    61 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in July in Keystone9
    9 (Very High) UV index

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The July weather guide for South Dakota (Keystone) 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)

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How hot is it in Keystone in July?

Daytime temperatures usually reach 29°C in Keystone in July with moderate heat and humidity, falling to 13°C at night.

How sunny is it in Keystone in July?

There are normally 11 hours of bright sunshine each day in Keystone in July - that's 71% of daylight hours.

Does it rain in Keystone in July?

There are usually 10 days with some rain in Keystone in July and the average monthly rainfall is 61mm.

Keystone July sunrise & sunset times

Browse the sunrise and sunset times for Keystone in July 2025. Select a month to view Keystone sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 04:15 19:40
Wednesday, 16th July 2025 04:26 19:33
Thursday, 31st July 2025 04:42 19:18

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