In Colorado, celebrating St. Patrick’s Day can mean anything from wearing a winter coat to enjoying a patio beer in the sunshine. The weather in Denver on March 17 has a long history of surprising residents, and this year looks like it will lean toward the warmer side of the spectrum.
After a winter that has been unusually warm and dry, the pattern this week is shifting back toward springlike weather—just in time for St. Patrick’s Day celebrations.
What Is “Normal” for St. Patrick’s Day in Denver?
Looking back at Denver’s weather records dating to 1872, the average St. Patrick’s Day is fairly mild but still carries hints of winter.
Typical conditions include:
- Average high: 53°F
- Average low: 28°F
- Chance of precipitation: about 26%
So while the calendar says spring is right around the corner, Denver’s atmosphere often has other ideas.
Historically, temperatures on March 17 have ranged widely. The warmest St. Patrick’s Day on record reached 76°F in 2012, while the coldest morning dropped to -6°F in 1892. That huge swing perfectly captures Colorado’s famously unpredictable spring weather.
Yes, It Has Snowed on St. Patrick’s Day
Snow on March 17 isn’t common, but it definitely happens. The snowiest St. Patrick’s Day in Denver produced 4.2 inches in 1906. More recently, many Coloradans likely remember the 4-inch snowfall in 2022, which turned the city briefly into a winter wonderland.
Still, most years stay dry. In fact, many St. Patrick’s Days in Denver record zero precipitation.
A Look at Recent Years
The last decade shows just how variable March can be:
- 2025: 74°F and sunny — one of the warmest on record
- 2022: Snowstorm with 4 inches of snow
- 2021: High of only 35°F
- 2017: Springlike warmth with a high of 71°F
In other words, anything is possible in Denver this time of year.
What to Expect for St. Patrick’s Day 2026
This year’s weather is trending toward the warm and dry side of Denver’s historical range.
After a recent snowstorm moved through the region, the jet stream is shifting northeast while a ridge of high pressure builds over Southern California. That setup will allow warmer air to move back into Colorado.
High temperatures across the Denver metro area are expected to rebound into the 70s, well above the long-term average of 53°F for March 17.
However, this warm pattern comes with a tradeoff.
Because the ridge will sit just to the southwest of Colorado, northeast parts of the state will remain under a northwest flow pattern. That can create breezy afternoon winds, especially across the plains.
Combined with very low humidity and increasing warmth, the region could see elevated fire weather conditions through much of the week, particularly across the northern plains toward the Cheyenne Ridge and the Nebraska border.
A Very Colorado St. Patrick’s Day
If the forecast holds, St. Patrick’s Day 2026 could feel more like late April than mid-March, with sunshine and temperatures in the 70s across the Front Range.
That’s quite a contrast to the snowstorms that sometimes show up this time of year, but it’s also a reminder of how quickly Colorado weather can flip from winter to spring.
So whether you’re enjoying green beer on a patio or simply soaking up the sunshine, this year’s St. Patrick’s Day looks like it will be one of the warmer celebrations in Denver’s long weather history.
Just remember: in Colorado, winter isn’t officially over until the mountains say so.