What is the hottest month in Denver?

July is Denver's hottest month, with the highest average daily high of the year. The month-by-month table above shows Denver's exact average high and low for each month, based on the 1991–2020 climate normals — the standard 30-year reference period meteorologists use.

What is the coldest month in Denver?

January is Denver's coldest month, with the lowest average daily low of the year. The averages-by-month chart above gives the exact average high and low for every month, so you can see how cold a typical winter day runs.

How much does it rain in Denver?

Denver's total annual precipitation and its wettest and driest months are shown in the rainfall-by-month section above. Those figures are 1991–2020 normals — the average monthly precipitation total across that 30-year window — so they reflect a typical year rather than any single wet or dry season.

What months are best to visit Denver?

The most comfortable months in Denver are usually the shoulder seasons — spring and fall — when temperatures sit between the summer peak and winter low and rainfall is moderate. Compare the average high, low, and precipitation for each month in the table above to pick the window that fits the weather you want.

Has Denver gotten hotter?

Yes. The warming-stripes chart above plots Denver's annual mean temperature for every complete year of station data from 1948 to 2025, and the trend line fitted to 1948–2025 rises about 1.7°F (+0.22°F per decade) — recent decades average warmer than the start of that window.

What is the record high temperature in Denver?

Denver's all-time record high — the hottest single day in the station record — is shown in the records section above, along with the date it occurred. Records are drawn from the nearest long-term weather station's full daily history, which begins in 1948, so they capture the most extreme heat on record, not just a typical summer day.

What is the record low temperature in Denver?

Denver's all-time record low and the date it was set appear in the records section above. Like the record high, it comes from the station's full daily history back to 1948, so it reflects the coldest day on record rather than an average winter low.

Denver, Colorado Climate

Denver weather by month — average highs and lows, rainfall, all-time records, and the warming record since 1948

Hottest month: 90°FJuly average high
Coldest month: 18°FJanuary average low
Precipitation: 15.4 ina year
Snowfall: 49.0 ina year

1991–2020 NOAA climate normals

At 8:05 AM MDT on Sep 21 it was 55°F in Denver — 5° above the 50°F typical for that hour (estimated from the Sep 21 normal high of 77°F and low of 46°F, interpolated from the monthly normals).

Denver weather by month

Average high, low, and rainfall for every month, from Denver’s 1991–2020 climate normals, the standard 30-year reference period. Each band runs from the month’s average low to its average high: a tall band is a big day-to-night swing.

47°18°

0.5″Jan

48°19°

0.5″Feb

56°27°

1.1″Mar

63°34°

1.7″Apr

72°43°

2.3″May

84°53°

1.7″Jun

90°59°

2.1″Jul

88°57°

1.8″Aug

80°48°

1.5″Sep

67°36°

1.0″Oct

55°26°

0.7″Nov

46°18°

0.5″Dec

Average high → low (°F)Rainfall (inches)1991–2020 normals

Denver monthly weather averages — average high, average low, and rainfall for each month, from the 1991–2020 U.S. Climate Normals (NOAA).
Month	Avg High	Avg Low	Rainfall
January	47°F	18°F	0.5 in
February	48°F	19°F	0.5 in
March	56°F	27°F	1.1 in
April	63°F	34°F	1.7 in
May	72°F	43°F	2.3 in
June	84°F	53°F	1.7 in
July	90°F	59°F	2.1 in
August	88°F	57°F	1.8 in
September	80°F	48°F	1.5 in
October	67°F	36°F	1.0 in
November	55°F	26°F	0.7 in
December	46°F	18°F	0.5 in
Annual	66°F	37°F	15.4 in

Denver’s warming record since 1948

Denver has warmed 1.7°F since 1948 (+0.22°F per decade, 1948–2025 trend)Gaps are years with incomplete station data.

Not what a typical year looks like, but how the typical year has changed. Each stripe is one complete year’s average temperature at the station, 1948 to 2025, colored against the mean of those years: blue for cooler years, red for warmer ones. The figure under the stripes is the least-squares trend line fitted to 1948–2025 — Denver averages about 1.7°F warmer by that trend than in 1948.

Compared with the national rankingThe fastest-warming cities ranking fits every city to the same years, 1970–2025, so rates compare like for like. Over that window Denver warms at +0.30°F per decade, #61 of 66. The figure above uses the station’s own record, 1948–2025, so the two rates differ.

Denver rainfall by month

Denver averages 15.4 inches of precipitation a year. The wettest month is May and the driest is January.

Denver also averages 49.0 inches of snowfall a year.

Denver temperature records

All-time record high: 104°Fset June 26, 1994
All-time record low: -25°Fset February 1, 1951

Records are drawn from the nearest long-term weather station’s full daily history, so they capture the most extreme single day Denver has recorded — not a typical seasonal high or low.

Frequently asked

What is the hottest month in Denver?: July is Denver's hottest month, with the highest average daily high of the year. The month-by-month table above shows Denver's exact average high and low for each month, based on the 1991–2020 climate normals — the standard 30-year reference period meteorologists use.
What is the coldest month in Denver?: January is Denver's coldest month, with the lowest average daily low of the year. The averages-by-month chart above gives the exact average high and low for every month, so you can see how cold a typical winter day runs.
How much does it rain in Denver?: Denver's total annual precipitation and its wettest and driest months are shown in the rainfall-by-month section above. Those figures are 1991–2020 normals — the average monthly precipitation total across that 30-year window — so they reflect a typical year rather than any single wet or dry season.
What months are best to visit Denver?: The most comfortable months in Denver are usually the shoulder seasons — spring and fall — when temperatures sit between the summer peak and winter low and rainfall is moderate. Compare the average high, low, and precipitation for each month in the table above to pick the window that fits the weather you want.
Has Denver gotten hotter?: Yes. The warming-stripes chart above plots Denver's annual mean temperature for every complete year of station data from 1948 to 2025, and the trend line fitted to 1948–2025 rises about 1.7°F (+0.22°F per decade) — recent decades average warmer than the start of that window.
What is the record high temperature in Denver?: Denver's all-time record high — the hottest single day in the station record — is shown in the records section above, along with the date it occurred. Records are drawn from the nearest long-term weather station's full daily history, which begins in 1948, so they capture the most extreme heat on record, not just a typical summer day.
What is the record low temperature in Denver?: Denver's all-time record low and the date it was set appear in the records section above. Like the record high, it comes from the station's full daily history back to 1948, so it reflects the coldest day on record rather than an average winter low.