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United States weather

Weather in Boulder, Colorado for October 2027

Your guide to Boulder weather in October - trends and predictions

    Temperatures

  • In general, the average temperature in Boulder at the beginning of October is 23.5 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.5 °C by the end of October.

    • Rain 🌧️

  • With an average of 4 rainy days, Boulder experiences minimal rainfall in October.

    • More

  • Is October a good time to visit Boulder? check out the best time to travel to Boulder page.

  • ✨ Is October a good time to visit Boulder? – Ask the AI Weatherman

Average dry days
27
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/7°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
43 %
Avg humidity

Boulder 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
Partly cloudy
26°
4
Sunny
25°
5
Patchy rain possible
24°
6
Light rain
20°
7
Sunny
21°
8
Partly cloudy
24°
9
Partly cloudy
26°
10
Light rain
24°
11
Overcast
23°
12
Cloudy
23°
13
Sunny
17°
14
Light rain
17°
15
Sunny
19°
16
Thundery outbreaks possible
18°
17
Sunny
19°
18
Thundery outbreaks possible
17°
19
Overcast
16°
20
Sunny
17°
21
Partly cloudy
19°
22
Partly cloudy
21°
23
Light rain
19°
24
Patchy rain possible
16°
25
Sunny
16°
26
Sunny
17°
27
Overcast
17°
28
Overcast
15°
29
Moderate or heavy rain shower
14°
30
Light snow
11°
31
Overcast
12°

Temperatures trend during October in Boulder

See the weather trend as well as the moving average line

October weather in Boulder day by day

Click on a date for more information
September November
Date Weather Temperatures Rain Snow More
Oct. 1 Sunny
Sunny
 22° /10° 0 mm 0 cm
Oct. 2 Sunny
Sunny
 27° /12° 0 mm 0 cm
Oct. 3 Partly cloudy
Partly cloudy
 26° /12° 0 mm 0 cm
Oct. 4 Sunny
Sunny
 25° /9° 0 mm 0 cm
Oct. 5 Patchy rain possible
Patchy rain possible
 24° /11° 1 mm 0 cm
Oct. 6 Light rain
Light rain
 20° /9° 5.1 mm 0 cm
Oct. 7 Sunny
Sunny
 21° /9° 0 mm 0 cm
Oct. 8 Partly cloudy
Partly cloudy
 24° /9° 0 mm 0 cm
Oct. 9 Partly cloudy
Partly cloudy
 26° /10° 0 mm 0 cm
Oct. 10 Light rain
Light rain
 24° /12° 2.5 mm 0 cm
Oct. 11 Overcast
Overcast
 23° /12° 0 mm 0 cm
Oct. 12 Cloudy
Cloudy
 23° /10° 0 mm 0 cm
Oct. 13 Sunny
Sunny
 17° /6° 0.9 mm 0 cm
Oct. 14 Light rain
Light rain
 17° /5° 5.8 mm 0 cm
Oct. 15 Sunny
Sunny
 19° /6° 0.5 mm 0 cm
Oct. 16 Thundery outbreaks possible
Thundery outbreaks possible
 18° /5° 0 mm 0 cm
Oct. 17 Sunny
Sunny
 19° /7° 0 mm 0 cm
Oct. 18 Thundery outbreaks possible
Thundery outbreaks possible
 17° /6° 0 mm 0 cm
Oct. 19 Overcast
Overcast
 16° /3° 0 mm 0 cm
Oct. 20 Sunny
Sunny
 17° /6° 0 mm 0 cm
Oct. 21 Partly cloudy
Partly cloudy
 19° /7° 0 mm 0 cm
Oct. 22 Partly cloudy
Partly cloudy
 21° /8° 0 mm 0 cm
Oct. 23 Light rain
Light rain
 19° /8° 5.2 mm 0 cm
Oct. 24 Patchy rain possible
Patchy rain possible
 16° /7° 1.9 mm 0 cm
Oct. 25 Sunny
Sunny
 16° /4° 0.2 mm 0 cm
Oct. 26 Sunny
Sunny
 17° /8° 0.6 mm 0 cm
Oct. 27 Overcast
Overcast
 17° /6° 0 mm 0 cm
Oct. 28 Overcast
Overcast
 15° /4° 0 mm 0 cm
Oct. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /1° 5.6 mm 0 cm
Oct. 30 Light snow
Light snow
 11° /2° 2.4 mm 1.7 cm
Oct. 31 Overcast
Overcast
 12° /2° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Boulder 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Boulder in October - FAQ

What are the expected maximum and minimum temperatures in Boulder 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 during October?
In October, Boulder can expect light to moderate rainfall, totaling 38.5 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.

Will it snow in Boulder in October 2027?
Boulder typically sees 2.6 cm of snowfall during October.

What are the typical wind conditions in Boulder during October?
The average wind speed in Boulder during October is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

Boulder snow forecast October 2027

Track daily snowfall levels and discover Boulder’s snowy potential this October ❄️

October rainfall patterns in Boulder

Explore the daily rainfall trends and prepare for Boulders October weather 💧
Typically, Boulder has 4 rainy days in October with a total of 38.5 mm of rainfall.

UV exposure in Boulder during October

Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Get accurate weather forecasts for Boulder, located at latitude 40.015 and longitude -105.271. Stay updated with localized weather information tailored for Boulder.

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