All twelve months on one wall, in four seasons. Each page shows the month’s average high, low and snow; open one for the full guide.
WinterDecember to February: cold nights, sunny days, big storms, the Stock Show and winter driving rules.
This monthDecember46°18°6.6″ snowShort Days, Dry Cold and Your First Real SnowWhat December is really like for a Denver newcomer: cold nights, sunny afternoons and snow that comes in bursts, including the city’s biggest one-day storm on record. How to get your car and home ready, what the traction law means on I-70, and why a library card is the best free winter gift in town.4 min read✓ readThis monthJanuary46°18°6.4″ snowThe Coldest Month, the Stock Show and New-Resident PaperworkJanuary is Denver’s coldest month on average, with clear skies between storms. A guide for newcomers: what the weather does, how to handle the deep cold snaps, the 16-day National Western Stock Show, and the Colorado paperwork that new residents should finish early in the year.4 min read✓ readThis monthFebruary48°19°7.6″ snowSnow Builds, Days Lengthen and Winter Trips Open UpFebruary brings a little more snow to Denver than January and noticeably longer days. How the month usually behaves, what record cold looks like, how to plan mountain trips safely in the heart of avalanche season, and how to visit Rocky Mountain National Park and the state parks in winter.4 min read✓ read
SpringMarch to May: the snowiest month, late storms, the last freeze, watering rules and booking the mountains.
This monthMarch56°27°8.8″ snowThe Snowiest Month and the Start of SpringMarch is Denver’s snowiest month on average, with heavy, wet storms that can arrive between warm days. Why spring snow is different, the record storms of 2003 and 2021, how to protect early plants, and why March 1 matters for anyone who wants to fish in Colorado.4 min read✓ readThis monthApril62°34°6.2″ snowBlossoms, Late Snow and Patience in the GardenApril in Denver swings between flowering trees and snowstorms. What the numbers say about late snow, why the garden should wait, how to time lawn watering, and the spring outings that make the month worth it.4 min read✓ readThis monthMay72°43°1.4″ snowLast Frost, Watering Rules and Booking the MountainsMay is when Denver turns green and the summer routines begin. The average last freeze, Denver Water’s watering rules that start May 1 (and 2026’s drought limits), why May is the wettest month, and how Rocky Mountain National Park’s timed entry system works for summer visits.4 min read✓ read
SummerJune to August: heat, afternoon thunderstorms, ozone alerts, Red Rocks and the high country.
This monthJune84°53°no snowLong Days, First Heat and Red Rocks SeasonJune is when Denver summer arrives: warm, dry days, cool evenings and the first 90-degree afternoons. What the weather does, how ozone alerts work, why Red Rocks is a city-owned treasure, and how to handle mountain trips as the national park’s reservation system takes hold.4 min read✓ readThis monthJuly90°59°no snowHeat, Afternoon Storms and Staying Safe OutdoorsJuly is Denver’s hottest month, with afternoon thunderstorms that can turn a sunny day stormy in an hour. How hot it gets, how to plan hikes around lightning, what ozone alert days mean for exercise, and how to keep a lawn alive under the city’s watering rules.4 min read✓ readThis monthAugust88°57°no snowLate Summer Heat and the Best High-Country WeeksAugust is still hot in Denver, but the high country is at its most accessible. What the month’s weather looks like, how to plan alpine hikes and national park visits, how to protect yourself from storms and altitude, and what to get ready before fall.4 min read✓ read
FallSeptember to November: golden aspens, the elk rut, the first freeze and snow, and getting ready for winter.
This monthSeptember80°48°0.8″ snowGolden Aspens, Bugling Elk and the First ChillSeptember is one of Denver’s finest months: warm days, cool nights and the start of fall color in the mountains. What the weather does, how early the first freeze and snow can come, how to watch the elk rut in Rocky Mountain National Park responsibly, and the September 1 start of winter driving rules.4 min read✓ readThis monthOctober67°36°3.9″ snowFirst Freeze, First Snow and Closing Up SummerOctober is when Denver’s fall turns toward winter. The average dates of the first freeze and first snow, the record early storms, what ends on October 1, the last weeks of national park reservations, and the checklist for getting a home and yard ready for winter.4 min read✓ readThis monthNovember55°26°7.3″ snowEarly Winter Storms and Getting Ready for the HolidaysNovember is one of Denver’s snowier months, with big storms possible and cold nights the norm. What to expect, the record November snowfall of 2024, how to be ready for shoveling and winter driving, and the indoor and outdoor things that make the season pleasant.4 min read✓ read
Monthly averages: NOAA U.S. Climate Normals 1991-2020, Denver-Stapleton station. Averages, not forecasts.