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Highlands Ranch, Colorado climate

Cfa Humid subtropical

Highlands Ranch has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 31°C, while the coldest is December averaging around −7°C at night. Precipitation totals about 382 mm a year and is strongly seasonal — August alone averages 57 mm while December barely receives 9 mm.

☀️ Summers

Hot

Highs near 31°C in July.

About 31 days a year above 32 °C

❄️ Winters

Very cold

Lows near −7°C in December.

About 151 freezing nights a year

🌧️ Rain

Fairly dry

About 382 mm of rain a year.

Wettest in August

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.1 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Highlands Ranch climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	7	8	12	15	20	27	31	29	25	18	11	7
Avg temp (°C)	0	1	5	8	13	19	23	22	17	10	4	0
Avg low (°C)	−7	−7	−3	1	6	11	15	14	9	2	−3	−7
Precipitation (mm)	10	11	26	49	52	50	45	57	33	25	13	9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	7	8	12	15	20	27
Avg temp (°C)	0	1	5	8	13	19
Avg low (°C)	−7	−7	−3	1	6	11
Precipitation (mm)	10	11	26	49	52	50

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	29	25	18	11	7
Avg temp (°C)	23	22	17	10	4	0
Avg low (°C)	15	14	9	2	−3	−7
Precipitation (mm)	45	57	33	25	13	9

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	4	5	6	9	9	8	10	10	6	6	4	4
Days with high ≥ 32°C (days)	—	—	—	—	0.4	6	14	8	2	—	—	—
Days with low ≤ 0°C (days)	28	25	21	12	3	0.0	—	—	0.6	9	22	30
Days with snowfall ≥ 2.5 cm (days)	0.6	0.7	0.7	0.3	0.1	—	—	—	0.0	0.5	0.6	1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	4	5	6	9	9	8
Days with high ≥ 32°C (days)	—	—	—	—	0.4	6
Days with low ≤ 0°C (days)	28	25	21	12	3	0.0
Days with snowfall ≥ 2.5 cm (days)	0.6	0.7	0.7	0.3	0.1	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	10	6	6	4	4
Days with high ≥ 32°C (days)	14	8	2	—	—	—
Days with low ≤ 0°C (days)	—	—	0.6	9	22	30
Days with snowfall ≥ 2.5 cm (days)	—	—	0.0	0.5	0.6	1

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	57	56	59	58	49	50	50	43	46	51	55
Clear days (≤ 30% cloud)	6	6	7	6	5	8	8	8	12	11	9	7
Partly cloudy days (30–70%)	14	13	13	12	14	15	16	14	11	11	12	14
Cloudy days (≥ 70%)	12	10	11	12	12	7	7	9	7	9	10	10
Relative humidity (%)	56	55	52	51	49	42	45	47	45	48	52	56
Wind speed (m/s)	2.8	2.9	2.9	2.9	2.5	2.5	2.3	2.2	2.2	2.3	2.4	2.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	57	57	56	59	58	49
Clear days (≤ 30% cloud)	6	6	7	6	5	8
Partly cloudy days (30–70%)	14	13	13	12	14	15
Cloudy days (≥ 70%)	12	10	11	12	12	7
Relative humidity (%)	56	55	52	51	49	42
Wind speed (m/s)	2.8	2.9	2.9	2.9	2.5	2.5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	50	50	43	46	51	55
Clear days (≤ 30% cloud)	8	8	12	11	9	7
Partly cloudy days (30–70%)	16	14	11	11	12	14
Cloudy days (≥ 70%)	7	9	7	9	10	10
Relative humidity (%)	45	47	45	48	52	56
Wind speed (m/s)	2.3	2.2	2.2	2.3	2.4	2.6

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Denver Centennial AP (NOAA GHCN station USW00093067), about 10 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →