Halloween in Denver, Colorado, can bring everything from sunny, mild afternoons to bitter cold and snow. Historical records dating back to 1872 show just how unpredictable October 31 can be in the Mile High City.
What Is Typical Halloween Weather?
Denver’s historical Halloween averages provide a useful starting point for planning trick-or-treating and other outdoor activities.
- Average high: 57.1°F
- Average low: 31.4°F
- Historical chance of rain: 19%
- Historical chance of snow: 12%
Afternoons are typically cool, while temperatures can drop toward freezing after sunset. A mild afternoon doesn’t necessarily mean comfortable conditions for evening trick-or-treating.
From Nearly 80 Degrees to Single Digits
Denver’s temperature records highlight the dramatic swings possible this time of year.
The warmest Halloween highs on record reached 79°F in both 1950 and 2016. On the other end of the spectrum, the coldest Halloween low was just 7°F in 2019.
That year, temperatures reached only 42°F during the day before plunging overnight. In contrast, Halloween 2016 brought a high of 79°F and a low of 45°F.
These extremes show how late October in Colorado can feel more like summer one year and winter the next.
Can It Snow on Halloween?
Absolutely! Although snow isn’t the norm, it is part of Denver’s Halloween history.
The snowiest Halloween on record occurred in 1972, when Denver received 8 inches of snow. Temperatures reached just 30°F, with a low of 15°F. Halloween 1889 also brought significant snowfall, with 5 inches recorded.
More recently, Denver’s last Halloween with officially recorded snowfall was in 2018, when a trace amount fell. A trace means snow was observed, but the amount was too small to measure to the usual reporting threshold.
What About Recent Halloweens?
The past several years demonstrate how quickly Halloween weather can change.
| Year | High | Low | Snowfall |
|---|---|---|---|
| 2020 | 65°F | 31°F | 0 in |
| 2021 | 44°F | 34°F | 0 in |
| 2022 | 69°F | 36°F | 0 in |
| 2023 | 51°F | 17°F | 0 in |
| 2024 | 61°F | 24°F | 0 in |
| 2025 | 48°F | 25°F | 0 in |
Halloween 2022 reached a comfortable 69°F, while 2021 peaked at just 44°F. Overnight lows have varied, too, making it important to check our forecast rather than assume this year’s conditions will resemble last year’s.
Has Halloween been rainy?
Rain is relatively uncommon on Halloween in Denver. Historical records show a 19% chance of rain, while the wettest Halloween occurred in 1889 with 0.66 inches of precipitation.
Halloween 1972 was also notably wet, recording 0.53 inches of precipitation alongside its 8 inches of snow. Still, most Halloweens pass without measurable precipitation.
The Bottom Line
Denver’s Halloween climate is a classic example of Colorado’s unpredictable fall weather. Snow and bitter cold are possible, but so are sunny afternoons and temperatures well above average.
If you’re heading out for trick-or-treating, wear layers beneath costumes, bring a warm jacket and check our latest forecast before leaving home. In Denver, a pleasant afternoon doesn’t guarantee a comfortable evening!