Grand Junction (CO)
May
Weather in Grand Junction, Colorado for May 2026
Your guide to Grand Junction weather in May - trends and predictions
Until now, May 2026 in Grand Junction is slightly cooler than the historical average by -0.6 °F.
The forecast for the coming days of May 2026 predicts a temperature of 30.4 °F , which is warmer than usual.
In general, the average temperature in Grand Junction at the beginning of May is 21.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 28.6 °F by the end of May.
Grand Junction experiences moderate rainfall in May, with an average of 9 rainy days and a total precipitation of 23.7 mm.
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Temperatures
Rain 🌧️
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22
Dry days
9
Rainy days
0
Snow days
25°/8°
Temperatures
19 km/h
Avg max wind
38 %
Avg humidity
Grand Junction Weather May
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Temperatures trend during May in Grand Junction
See the weather trend as well as the moving average line
May weather in Grand Junction day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 20° /5° | 0.2 mm | 8 | |
| May 2 |  Sunny | 23° /5° | 0 mm | 8 | |
| May 3 |  Overcast | 25° /5° | 0 mm | 7 | |
| May 4 | Overcast | 22° /10° | 0.9 mm | 7 | |
| May 5 |  Moderate rain at times | 21° /7° | 1.6 mm | 8 | |
| May 6 | Moderate or heavy rain shower | 17° /5° | 4.7 mm | 8 | |
| May 7 | Overcast | 20° /4° | 0 mm | 8 | |
| May 8 | Sunny | 26° /6° | 0 mm | 9 | |
| May 9 | Sunny | 27° /8° | 0 mm | 9 | |
| May 10 | Sunny | 27° /9° | 0 mm | 9 | |
| May 11 | Sunny | 34° /11° | 0 mm | 9.8 | |
| May 12 | Sunny | 32° /13° | 0 mm | 9.7 | |
| May 13 | Sunny | 31° /15° | 0 mm | 7.6 | |
| May 14 | Sunny | 29° /15° | 0 mm | 9.3 | |
| May 15 | Sunny | 27° /9° | 0 mm | 0 | |
| May 16 | Sunny | 27° /9° | 0 mm | 5 | |
| May 17 | Sunny | 31° /12° | 0 mm | 6 | |
| May 18 | Sunny | 30° /15° | 0 mm | 6 | |
| May 19 | Sunny | 29° /13° | 0 mm | 6 | |
| May 20 | Patchy rain possible | 31° /13° | 0.1 mm | 5 | |
| May 21 | Sunny | 30° /13° | 0 mm | 6 | |
| May 22 | Sunny | 31° /12° | 0 mm | 6 | |
| May 23 | Patchy rain possible | 32° /14° | 0.2 mm | 5 | |
| May 24 | Sunny | 32° /14° | 0 mm | 6 | |
| May 25 |  Cloudy | 27° /13° | 0 mm | 6 | |
| May 26 | Sunny | 25° /10° | 0 mm | 7 | |
| May 27 |  Partly cloudy | 28° /11° | 0 mm | 7 | |
| May 28 | Partly cloudy | 27° /12° | 0 mm | 7 | |
| May 29 | Partly cloudy | 30° /13° | 0 mm | 8 | |
| May 30 | Sunny | 31° /8° | 0 mm | 8 | |
| May 31 | Sunny | 32° /9° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Grand Junction in May 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 Grand Junction forecast closer to your planned date for the most up-to-date weather information.
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Grand Junction in May - FAQ
What are the expected maximum and minimum temperatures in Grand Junction during May?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Grand Junction during May?
In May, Grand Junction can expect light to moderate rainfall, totaling 23.7 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Grand Junction during May?
The average wind speed in Grand Junction during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Grand Junction
Explore the daily rainfall trends and prepare for Grand Junctions May weather 💧
Typically, Grand Junction has 9 rainy days in May with a total of 23.7 mm of rainfall.
UV exposure in Grand Junction during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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