Aurora climate

Name: Aurora
Address: US

Aurora is warmest in July, with average highs of 31 °C, and coldest in December, when nights average -7.4 °C. May is the wettest month (65 mm) and January the driest (14 mm). Figures are 1991–2020 climate normals.

Across a full year Aurora averages 394 mm of rain, 115 days above 25 °C and 146 days below freezing.

United States · 1,648 m elevation · population 359,407 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 31 °C
Coldest month December -7.4 °C
Driest month January 14 mm
Wettest month May 65 mm
Least cloud September 34 % cloud
Hottest on record June 39 °C
Coldest on record February -32 °C

What to expectAurora through the year

Aurora has a clear annual cycle: average daily highs run from 5.6 °C in December to 31 °C in July, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 115 days a year reach 25 °C, 53 of them reach 30 °C, 146 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in June.

Rain is strongly seasonal. May averages 65 mm against 14 mm in January — 4.6 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	6.1 °C	14 mm	43 %
February	7.8 °C	14 mm	46 %
March	12.9 °C	36 mm	46 %
April	16.6 °C	56 mm	51 %
May	21.7 °C	65 mm	51 %
June	28.0 °C	41 mm	41 %
July	30.9 °C	39 mm	40 %
August	29.6 °C	35 mm	40 %
September	26.0 °C	28 mm	34 %
October	18.8 °C	31 mm	37 %
November	11.1 °C	20 mm	40 %
December	5.6 °C	14 mm	40 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	6.1 °C	-7.3 °C	-2.2 °C	19.3 °C	-26.3 °C	0	0	30
February	7.8 °C	-6.6 °C	-0.8 °C	22.7 °C	-32.2 °C	0	0	27
March	12.9 °C	-2.6 °C	3.9 °C	26.7 °C	-24.5 °C	0	0	22
April	16.6 °C	1.2 °C	8.0 °C	28.7 °C	-17.5 °C	1	0	10
May	21.7 °C	6.9 °C	13.7 °C	33.8 °C	-10.9 °C	9	1	1
June	28.0 °C	12.5 °C	20.0 °C	38.9 °C	2.6 °C	23	11	0
July	30.9 °C	16.1 °C	23.3 °C	37.6 °C	8.5 °C	29	20	0
August	29.6 °C	15.3 °C	22.1 °C	37.1 °C	6.2 °C	28	15	0
September	26.0 °C	11.0 °C	17.8 °C	36.4 °C	-7.3 °C	20	5	0
October	18.8 °C	4.0 °C	10.2 °C	29.7 °C	-19.8 °C	4	0	5
November	11.1 °C	-2.8 °C	2.7 °C	24.6 °C	-23.9 °C	0	0	20
December	5.6 °C	-7.4 °C	-2.5 °C	19.3 °C	-29.5 °C	0	0	30

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	14 mm	3	9.7 h/day	43 %	57 %	16 km/h
February	14 mm	4	11 h/day	46 %	55 %	18 km/h
March	36 mm	6	12 h/day	46 %	52 %	20 km/h
April	56 mm	8	13 h/day	51 %	52 %	21 km/h
May	65 mm	10	14 h/day	51 %	54 %	20 km/h
June	41 mm	7	15 h/day	41 %	47 %	20 km/h
July	39 mm	7	15 h/day	40 %	46 %	18 km/h
August	35 mm	6	14 h/day	40 %	48 %	18 km/h
September	28 mm	4	12 h/day	34 %	46 %	18 km/h
October	31 mm	5	11 h/day	37 %	50 %	18 km/h
November	20 mm	4	10 h/day	40 %	54 %	17 km/h
December	14 mm	3	9.4 h/day	40 %	57 %	16 km/h

How Aurora compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Aurora	31 °C	-7.4 °C	394 mm	115
Denver · United States	30 °C	-8.7 °C	494 mm	107
Lakewood · United States	30 °C	-8.3 °C	505 mm	102
Fort Collins · United States	30 °C	-7.7 °C	474 mm	99
Colorado Springs · United States	29 °C	-8.4 °C	480 mm	98

Where Aurora ranks

Ranking	Position	Value
Places with the best weather in North America in September	22nd of 50	91/100
The driest places in North America year-round	34th of 50	33 mm
The driest places in North America in September	47th of 50	28 mm
The driest places in North America in November	49th of 50	20 mm
The driest places in North America in January	50th of 50	14 mm

Planning a trip? See the best time to visit Aurora.

QuestionsCommon questions about Aurora’s climate

When is the best time to visit Aurora?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, August, September sit closest to 20 °C on average, July is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Aurora get?

In July, the warmest month, daily highs average 31 °C. About 53 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average -7.4 °C in December, the coldest month. A normal year has 146 nights below freezing.

Which month is wettest in Aurora?

May, averaging 65 mm over 10 days with rain. The driest month is January with 14 mm. The year as a whole averages 394 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Aurora rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 39.729°, -104.832° , 1648 m above sea level (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.