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Chamblee, Georgia climate

Cfa Humid subtropical

Chamblee has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 32°C, while the coldest is January averaging around 0°C at night. Precipitation is fairly even year-round, totalling about 1306 mm.

☀️ Summers

Hot

Highs near 32°C in July.

About 53 days a year above 32 °C

❄️ Winters

Chilly

Lows near 0°C in January.

About 47 freezing nights a year

🌧️ Rain

Wet

About 1306 mm of rain a year.

Wettest in July

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

−0.8 °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

Chamblee climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	11	14	18	23	27	30	32	31	28	23	17	12
Avg temp (°C)	6	8	12	16	21	25	26	26	23	17	11	7
Avg low (°C)	0	2	6	10	15	19	21	21	17	11	5	2
Precipitation (mm)	116	114	119	98	97	119	120	115	105	86	107	111

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	11	14	18	23	27	30
Avg temp (°C)	6	8	12	16	21	25
Avg low (°C)	0	2	6	10	15	19
Precipitation (mm)	116	114	119	98	97	119

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	31	28	23	17	12
Avg temp (°C)	26	26	23	17	11	7
Avg low (°C)	21	21	17	11	5	2
Precipitation (mm)	120	115	105	86	107	111

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	11	10	10	11	12	12	11	8	9	9	11
Days with high ≥ 32°C (days)	—	—	0.0	—	2	11	17	16	6	0.3	—	—
Days with low ≤ 0°C (days)	16	10	4	0.3	0.0	0.0	—	—	—	0.3	4	12
Days with snowfall ≥ 2.5 cm (days)	—	0.0	—	—	—	—	—	—	—	—	—	—

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	11	10	10	11	12
Days with high ≥ 32°C (days)	—	—	0.0	—	2	11
Days with low ≤ 0°C (days)	16	10	4	0.3	0.0	0.0
Days with snowfall ≥ 2.5 cm (days)	—	0.0	—	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	12	11	8	9	9	11
Days with high ≥ 32°C (days)	17	16	6	0.3	—	—
Days with low ≤ 0°C (days)	—	—	—	0.3	4	12
Days with snowfall ≥ 2.5 cm (days)	—	—	—	—	—	—

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	58	61	58	53	53	57	57	55	49	44	49	59
Clear days (≤ 30% cloud)	8	6	8	10	9	6	6	7	11	13	11	8
Partly cloudy days (30–70%)	10	9	10	9	11	12	14	13	10	9	9	9
Cloudy days (≥ 70%)	13	13	13	11	11	11	11	11	9	9	10	14
Relative humidity (%)	83	83	81	79	77	74	71	70	70	72	76	83
Wind speed (mph)	2.8	2.9	2.9	2.8	2.3	2.0	1.9	1.9	2.2	2.4	2.5	2.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	58	61	58	53	53	57
Clear days (≤ 30% cloud)	8	6	8	10	9	6
Partly cloudy days (30–70%)	10	9	10	9	11	12
Cloudy days (≥ 70%)	13	13	13	11	11	11
Relative humidity (%)	83	83	81	79	77	74
Wind speed (mph)	2.8	2.9	2.9	2.8	2.3	2.0

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	55	49	44	49	59
Clear days (≤ 30% cloud)	6	7	11	13	11	8
Partly cloudy days (30–70%)	14	13	10	9	9	9
Cloudy days (≥ 70%)	11	11	9	9	10	14
Relative humidity (%)	71	70	70	72	76	83
Wind speed (mph)	1.9	1.9	2.2	2.4	2.5	2.6

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Atlanta Dekalb Peachtree AP (NOAA GHCN station USW00053863), about 2 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 →