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United States weather

Weather in Jefferson County, Colorado for May 2026

Your guide to Jefferson County weather in May - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Jefferson County during May is quite rare, with fewer than 2 snowy days on average.
    According to Jefferson County snow forecast for May 2026, no snow is expected in the next 2 weeks.

    • Temperatures

  • Until now, May 2026 in Jefferson County has been nearly identical to the historical average, with a temperature of 16.3 °F (showing only a slight deviation of 0.1 °F).

  • The forecast for the next days in Jefferson County predicts the temperature to be 28.6 °F, significantly warmer than the historical average.

  • In general, the average temperature in Jefferson County at the beginning of May is 15.9 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.1 °F by the end of May.

    • Rain 🌧️

  • Jefferson County in May brings notable rainfall, with an average of 16 rainy days and a total precipitation of 180.8 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
14
Dry days
Average rainy days
16
Rainy days
Average snowy days
1
Snow days
Average temperatures
20°/7°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
50 %
Avg humidity

Jefferson County Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
15°
2
Partly cloudy
17°
3
Patchy rain possible
21°
4
Patchy light rain
21°
5
Overcast
15°
6
Patchy rain possible
9°
7
Patchy rain possible
13°
8
Partly cloudy
17°
9
Light sleet showers
18°
10
Thundery outbreaks possible
18°
11
Sunny
29°
12
Sunny
25°
13
Patchy rain possible
29°
14
Patchy rain possible
25°
15
Patchy rain possible
29°
16
Sunny
27°
17
Sunny
29°
18
Sunny
30°
19
Partly cloudy
28°
20
Sunny
30°
21
Sunny
25°
22
Sunny
31°
23
Sunny
30°
24
Sunny
33°
25
Moderate rain at times
20°
26
Moderate rain at times
19°
27
Patchy rain possible
24°
28
Partly cloudy
23°
29
Patchy rain possible
24°
30
Moderate rain at times
26°
31
Patchy rain possible
26°

Temperatures trend during May in Jefferson County

See the weather trend as well as the moving average line

May weather in Jefferson County day by day

Click on a date for more information
April June
Date Weather Temperatures Rain Snow More
May 1 Overcast
Overcast
 15° /4° 2.5 mm 0 cm
May 2 Partly cloudy
Partly cloudy
 17° /4° 0.1 mm 0 cm
May 3 Patchy rain possible
Patchy rain possible
 21° /4° 0.1 mm 0 cm
May 4 Patchy light rain
Patchy light rain
 21° /6° 1.3 mm 0 cm
May 5 Overcast
Overcast
 15° /6° 15.7 mm 0 cm
May 6 Patchy rain possible
Patchy rain possible
 9° /2° 37.6 mm 2.1 cm
May 7 Patchy rain possible
Patchy rain possible
 13° /2° 25 mm 0 cm
May 8 Partly cloudy
Partly cloudy
 17° /3° 0.1 mm 0 cm
May 9 Light sleet showers
Light sleet showers
 18° /5° 2.9 mm 0.7 cm
May 10 Thundery outbreaks possible
Thundery outbreaks possible
 18° /4° 0.3 mm 0 cm
May 11 Sunny
Sunny
 29° /10° 0 mm 0 cm
May 12 Sunny
Sunny
 25° /14° 0.1 mm 0 cm
May 13 Patchy rain possible
Patchy rain possible
 29° /14° 2.2 mm 0 cm
May 14 Patchy rain possible
Patchy rain possible
 25° /14° 0.4 mm 0 cm
May 15 Patchy rain possible
Patchy rain possible
 29° /12° 0.5 mm 0 cm
May 16 Sunny
Sunny
 27° /13° 0 mm 0 cm
May 17 Sunny
Sunny
 29° /13° 0 mm 0 cm
May 18 Sunny
Sunny
 30° /15° 0 mm 0 cm
May 19 Partly cloudy
Partly cloudy
 28° /14° 0 mm 0 cm
May 20 Sunny
Sunny
 30° /14° 0 mm 0 cm
May 21 Sunny
Sunny
 25° /16° 0.1 mm 0 cm
May 22 Sunny
Sunny
 31° /13° 0 mm 0 cm
May 23 Sunny
Sunny
 30° /16° 0 mm 0 cm
May 24 Sunny
Sunny
 33° /16° 0 mm 0 cm
May 25 Moderate rain at times
Moderate rain at times
 20° /9° 19 mm 0 cm
May 26 Moderate rain at times
Moderate rain at times
 19° /9° 9 mm 0 cm
May 27 Patchy rain possible
Patchy rain possible
 24° /9° 0.7 mm 0 cm
May 28 Partly cloudy
Partly cloudy
 23° /10° 2.9 mm 0 cm
May 29 Patchy rain possible
Patchy rain possible
 24° /10° 1.4 mm 0 cm
May 30 Moderate rain at times
Moderate rain at times
 26° /10° 0.9 mm 0 cm
May 31 Patchy rain possible
Patchy rain possible
 26° /9° 0.4 mm 0 cm
Next
Important Notice
Our weather forecast for Jefferson County 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 Jefferson County forecast closer to your planned date for the most up-to-date weather information.
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Jefferson County in May - FAQ

What are the expected maximum and minimum temperatures in Jefferson County during May?

Enjoy moderate daytime temperatures of up to 20° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Jefferson County during May?

Significant rainfall exceeding 180.8 mm is expected in Jefferson County during May, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Jefferson County in May 2026?

Jefferson County typically sees 1.08 cm of snowfall during May.

What are the typical wind conditions in Jefferson County during May?

The average wind speed in Jefferson County during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

Jefferson County snow forecast May 2026

Track daily snowfall levels and discover Jefferson County’s snowy potential this May ❄️
On average, Jefferson County sees 1 snowy days during May, with approximately 1.1 cm of total snowfall.

May rainfall patterns in Jefferson County

Explore the daily rainfall trends and prepare for Jefferson Countys May weather 💧
Typically, Jefferson County has 16 rainy days in May with a total of 180.8 mm of rainfall.

UV exposure in Jefferson County during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Top locations in Jefferson County
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BeaumontBirminghamFairfieldLakewoodLouisvilleWatertown
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Location coordinates Where is Jefferson County?

Get accurate weather forecasts for Jefferson County, located at latitude 39.705 and longitude -105.081. Stay updated with localized weather information tailored for Jefferson County.

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