Littleton, Colorado Weather
Hourly forecast in Littleton
16-day forecast for Littleton
Check any date
Littleton air quality & conditions
Air quality index
Today's outlook for Littleton
Loading today's outlook…
Explore nearby
Weather articles
Weather news
Climate of Littleton: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Littleton, with average daytime highs around 30°C. December is the coolest, when nights typically fall to about -8°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 38°C, so the seasons feel very different from each other.
The area receives about 440 mm of rain in a typical year. Rainfall is modest in every month; July is the wettest at about 62 mm. The driest stretch is November to January, with under 20 mm a month.
For outdoor plans and travel, June to September usually offer the most comfortable weather in Littleton, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 4° | -7° | 17 mm | 55% |
| Feb | 5° | -8° | 21 mm | 56% |
| Mar | 10° | -4° | 34 mm | 52% |
| Apr | 15° | -1° | 51 mm | 50% |
| May | 21° | 4° | 58 mm | 49% |
| Jun | 28° | 11° | 42 mm | 41% |
| Jul | 30° | 15° | 62 mm | 45% |
| Aug | 28° | 13° | 52 mm | 46% |
| Sep | 24° | 8° | 36 mm | 44% |
| Oct | 17° | 1° | 30 mm | 48% |
| Nov | 10° | -4° | 18 mm | 51% |
| Dec | 4° | -8° | 19 mm | 56% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Littleton. Values describe typical conditions, not a forecast.
About Littleton weather
Littleton is a place in Colorado's high-altitude climate, ranging from semi-arid plains to alpine mountains, located about 14 km south of Denver. Littleton gets warm days and cool nights (June–August), especially at altitude each year. Littleton closes out the year with cold, snowy winters in the mountains, milder on the eastern plains. This page shows live, auto-refreshing weather for Littleton: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Denver.
Frequently asked questions
Littleton is about 14 km south of Denver, in Colorado.
Littleton sees cold, snowy winters in the mountains, milder on the eastern plains.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Littleton's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Littleton, with average daytime highs of about 30°C and nights around 15°C.
The coldest nights come in December, when the average low is about -8°C and daytime highs reach around 4°C. Frost is possible on clear, calm nights.
Littleton receives about 440 mm of rain in a typical year. July is the wettest month at roughly 62 mm; no month averages more than 100 mm.
June to September usually offer the most comfortable weather in Littleton, with mild daytime temperatures and little rain.
In November Littleton typically sees daytime highs near 10°C and lows near -4°C, with about 18 mm of rain over the month and average humidity around 51%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Littleton updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Littleton's day-to-day weather follows the broader pattern of Colorado described above. See the hourly weather forecast or the air quality index for more detail.