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Bartlesville, Oklahoma climate

Cfa Humid subtropical

Bartlesville has a strongly seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 34°C, while the coldest is January averaging around −6°C at night. Around 1009 mm of precipitation falls each year, peaking in June (135 mm) and easing off in February (48 mm).

☀️ Summers

Hot

Highs near 34°C in July.

About 68 days a year above 32 °C

❄️ Winters

Cold

Lows near −6°C in January.

About 94 freezing nights a year

🌧️ Rain

Moderate rainfall

About 1009 mm of rain a year.

Wettest in June

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

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

Bartlesville climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	9	12	16	22	26	31	34	33	29	23	16	10
Avg temp (°C)	1	4	9	14	19	24	27	26	22	15	8	3
Avg low (°C)	−6	−4	1	7	12	18	20	19	14	7	1	−4
Precipitation (mm)	51	48	75	102	123	135	94	85	88	88	64	56

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	9	12	16	22	26	31
Avg temp (°C)	1	4	9	14	19	24
Avg low (°C)	−6	−4	1	7	12	18
Precipitation (mm)	51	48	75	102	123	135

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	34	33	29	23	16	10
Avg temp (°C)	27	26	22	15	8	3
Avg low (°C)	20	19	14	7	1	−4
Precipitation (mm)	94	85	88	88	64	56

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	7	7	10	9	7	8	7	7	5	6
Days with high ≥ 32°C (days)	—	—	0.1	0.3	2	15	21	20	9	0.5	—	—
Days with low ≤ 0°C (days)	24	16	10	3	0.1	—	—	—	—	2	14	25
Days with snowfall ≥ 2.5 cm (days)	0.3	0.8	0.4	—	—	—	—	—	—	—	0.1	0.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	4	5	7	7	10	9
Days with high ≥ 32°C (days)	—	—	0.1	0.3	2	15
Days with low ≤ 0°C (days)	24	16	10	3	0.1	—
Days with snowfall ≥ 2.5 cm (days)	0.3	0.8	0.4	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	7	8	7	7	5	6
Days with high ≥ 32°C (days)	21	20	9	0.5	—	—
Days with low ≤ 0°C (days)	—	—	—	2	14	25
Days with snowfall ≥ 2.5 cm (days)	—	—	—	—	0.1	0.3

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	55	59	60	58	58	50	42	44	45	47	51	56
Clear days (≤ 30% cloud)	9	6	7	7	8	9	13	12	12	12	10	9
Partly cloudy days (30–70%)	10	10	10	10	10	12	11	11	9	9	9	9
Cloudy days (≥ 70%)	13	12	14	13	13	9	7	8	9	10	11	13
Relative humidity (%)	77	75	72	71	76	75	68	64	65	68	74	78
Wind speed (mph)	7.6	8.0	8.6	8.6	7.2	6.5	5.8	5.6	6.3	7.2	7.5	7.1

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	55	59	60	58	58	50
Clear days (≤ 30% cloud)	9	6	7	7	8	9
Partly cloudy days (30–70%)	10	10	10	10	10	12
Cloudy days (≥ 70%)	13	12	14	13	13	9
Relative humidity (%)	77	75	72	71	76	75
Wind speed (mph)	7.6	8.0	8.6	8.6	7.2	6.5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	42	44	45	47	51	56
Clear days (≤ 30% cloud)	13	12	12	12	10	9
Partly cloudy days (30–70%)	11	11	9	9	9	9
Cloudy days (≥ 70%)	7	8	9	10	11	13
Relative humidity (%)	68	64	65	68	74	78
Wind speed (mph)	5.8	5.6	6.3	7.2	7.5	7.1

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Bartlesville 3 (NOAA GHCN station USC00340546), about 3 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 →