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Weather in Boulder County, Colorado for October 2026

Your guide to Boulder County weather in October - trends and predictions

    Snow Forecast ❄️

  • Snowfall in Boulder County during October is quite rare, with fewer than 2 snowy days on average.
    According to Boulder County snow forecast for October 2026, 1 snowy day is expected at the beginning of October at Sunday, October 4.

    • Temperatures

  • The forecast for the first days of October 2026 in Boulder County predicts temperatures to be around 22 °F, close to the historical average.

  • In general, the average temperature in Boulder County at the beginning of October is 21.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.9 °F by the end of October.

    • Rain 🌧️

  • Boulder County experiences moderate rainfall in October, with an average of 7 rainy days and a total precipitation of 36.5 mm.

    • More

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

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
1
Snow days
Average temperatures
19°/7°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
43 %
Avg humidity

Boulder County Weather October

Move between months or click on a day
September
November
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
22°
2
Sunny
27°
3
Overcast
18°
4
Sunny
9°
5
Sunny
23°
6
Sunny
25°
7
Sunny
26°
8
Sunny
25°
9
Sunny
25°
10
Sunny
24°
11
Overcast
21°
12
Cloudy
22°
13
Sunny
17°
14
Sunny
20°
15
Sunny
22°
16
Thundery outbreaks possible
21°
17
Thundery outbreaks possible
18°
18
Thundery outbreaks possible
16°
19
Overcast
15°
20
Thundery outbreaks possible
16°
21
Partly cloudy
18°
22
Partly cloudy
21°
23
Sunny
17°
24
Sunny
18°
25
Sunny
17°
26
Sunny
19°
27
Overcast
17°
28
Overcast
14°
29
Moderate or heavy rain shower
13°
30
Moderate or heavy snow showers
8°
31
Sunny
9°

Temperatures trend during October in Boulder County

See the weather trend as well as the moving average line

October weather in Boulder County day by day

Click on a date for more information
September November
Date Weather Temperatures Rain Snow More
Oct. 1 Sunny
Sunny
 22° /11° 0 mm 0 cm
Oct. 2 Sunny
Sunny
 27° /9° 0 mm 0 cm
Oct. 3 Overcast
Overcast
 18° /7° 12.5 mm 0 cm
Oct. 4 Sunny
Sunny
 9° /2° 4.7 mm 0.2 cm
Oct. 5 Sunny
Sunny
 23° /5° 0 mm 0 cm
Oct. 6 Sunny
Sunny
 25° /12° 0 mm 0 cm
Oct. 7 Sunny
Sunny
 26° /12° 0 mm 0 cm
Oct. 8 Sunny
Sunny
 25° /13° 0 mm 0 cm
Oct. 9 Sunny
Sunny
 25° /13° 0 mm 0 cm
Oct. 10 Sunny
Sunny
 24° /12° 3.3 mm 0 cm
Oct. 11 Overcast
Overcast
 21° /11° 0 mm 0 cm
Oct. 12 Cloudy
Cloudy
 22° /10° 0 mm 0 cm
Oct. 13 Sunny
Sunny
 17° /6° 0 mm 0 cm
Oct. 14 Sunny
Sunny
 20° /5° 1.4 mm 0 cm
Oct. 15 Sunny
Sunny
 22° /8° 0 mm 0 cm
Oct. 16 Thundery outbreaks possible
Thundery outbreaks possible
 21° /8° 0 mm 0 cm
Oct. 17 Thundery outbreaks possible
Thundery outbreaks possible
 18° /9° 0 mm 0 cm
Oct. 18 Thundery outbreaks possible
Thundery outbreaks possible
 16° /5° 0 mm 0 cm
Oct. 19 Overcast
Overcast
 15° /3° 0 mm 0 cm
Oct. 20 Thundery outbreaks possible
Thundery outbreaks possible
 16° /5° 0 mm 0 cm
Oct. 21 Partly cloudy
Partly cloudy
 18° /7° 0 mm 0 cm
Oct. 22 Partly cloudy
Partly cloudy
 21° /7° 0 mm 0 cm
Oct. 23 Sunny
Sunny
 17° /8° 7.8 mm 0 cm
Oct. 24 Sunny
Sunny
 18° /7° 2.8 mm 0 cm
Oct. 25 Sunny
Sunny
 17° /4° 0 mm 0 cm
Oct. 26 Sunny
Sunny
 19° /9° 0 mm 0 cm
Oct. 27 Overcast
Overcast
 17° /8° 0 mm 0 cm
Oct. 28 Overcast
Overcast
 14° /5° 0 mm 0 cm
Oct. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /0° 8.4 mm 0 cm
Oct. 30 Moderate or heavy snow showers
Moderate or heavy snow showers
 8° /1° 3.6 mm 2.6 cm
Oct. 31 Sunny
Sunny
 9° /0° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Boulder County in October 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 Boulder County forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Boulder County in October - FAQ

What are the expected maximum and minimum temperatures in Boulder County during October?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Boulder County during October?
In October, Boulder County can expect light to moderate rainfall, totaling 36.5 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.

Will it snow in Boulder County in October 2026?
Boulder County typically sees 2.6 cm of snowfall during October.

What are the typical wind conditions in Boulder County during October?
The average wind speed in Boulder County during October is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Boulder County snow forecast October 2026

Track daily snowfall levels and discover Boulder County’s snowy potential this October ❄️
On average, Boulder County sees 1 snowy days during October, with approximately 2.6 cm of total snowfall.

October rainfall patterns in Boulder County

Explore the daily rainfall trends and prepare for Boulder Countys October weather 💧
Typically, Boulder County has 7 rainy days in October with a total of 36.5 mm of rainfall.

UV exposure in Boulder County during October

Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Location coordinates Where is Boulder County?

Get accurate weather forecasts for Boulder County, located at latitude 40.015 and longitude -105.271. Stay updated with localized weather information tailored for Boulder County.

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