Keystone, United States — 14-Day Weather Forecast

The 7-day forecast for Keystone is generally reliable for temperature trends and major weather patterns. Days 1–3 are most accurate, while days 8–14 should be used for general planning only.

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The rain percentage shows the probability of precipitation occurring at any point during that day. A 30% chance means there's roughly a 1-in-3 chance of rain.

Keystone averages about 162 mm of rainfall over 20 rainy days in June. Check the precipitation chart above for the latest day-by-day outlook.

Snow is rare or absent in Keystone. Winter temperatures typically stay above freezing, so precipitation falls as rain rather than snow.

Wind speeds in Keystone average up to 14 km/h (9 mph) in June. Check the wind tab in the interactive chart above for hourly and daily wind forecasts.

The average UV index in Keystone during June is 8. This is high — wear sunscreen and limit midday sun exposure.

UV 1–2 is low risk. UV 3–5 is moderate — wear sunscreen. UV 6–7 is high — limit midday sun exposure. UV 8+ is very high — seek shade and wear protective clothing.

Average humidity in Keystone during June is around 79%. This is quite humid — expect muggy conditions, especially in the afternoon.

The 'feels like' temperature accounts for wind chill and humidity to reflect how the air actually feels on your skin. In cold, windy conditions it will be lower than the actual temperature; in hot, humid conditions it will be higher.