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Yakima, Washington climate

BSk Cold semi-arid

Yakima has a seasonal cool-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 32°C, while the coldest is December averaging around −5°C at night. Precipitation totals about 203 mm a year and is strongly seasonal — December alone averages 37 mm while July barely receives 5 mm. Light snow accumulates each winter (52 cm of snow per year on average).

☀️ Summers

Hot

Highs near 32°C in July.

About 40 days a year above 32 °C

❄️ Winters

Cold

Lows near −5°C in December.

About 148 freezing nights a year

🌧️ Rain & snow

Very dry

About 203 mm of rain a year, plus 52 cm of snow.

Snow falls through the winter months

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.6 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 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

Yakima climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	4	8	14	18	23	27	32	31	26	18	9	3
Avg temp (°C)	0	3	6	10	15	18	22	22	17	10	3	−1
Avg low (°C)	−4	−3	−1	2	6	10	13	12	7	2	−3	−5
Precipitation (mm)	30	21	16	14	19	13	5	5	6	16	22	37
Snowfall (cm)	16	7	2	—	—	—	—	—	—	0	8	20

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	4	8	14	18	23	27
Avg temp (°C)	0	3	6	10	15	18
Avg low (°C)	−4	−3	−1	2	6	10
Precipitation (mm)	30	21	16	14	19	13
Snowfall (cm)	16	7	2	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	31	26	18	9	3
Avg temp (°C)	22	22	17	10	3	−1
Avg low (°C)	13	12	7	2	−3	−5
Precipitation (mm)	5	5	6	16	22	37
Snowfall (cm)	—	—	—	0	8	20

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	7	7	6	6	5	2	2	3	6	8	10
Days with high ≥ 32°C (days)	—	—	—	0.0	2	5	17	14	3	0.0	—	—
Days with low ≤ 0°C (days)	27	23	20	11	3	0.1	—	—	0.7	11	23	28
Days with snowfall ≥ 2.5 cm (days)	2	0.7	0.2	—	—	—	—	—	—	0.0	0.8	2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	7	7	6	6	5
Days with high ≥ 32°C (days)	—	—	—	0.0	2	5
Days with low ≤ 0°C (days)	27	23	20	11	3	0.1
Days with snowfall ≥ 2.5 cm (days)	2	0.7	0.2	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	2	2	3	6	8	10
Days with high ≥ 32°C (days)	17	14	3	0.0	—	—
Days with low ≤ 0°C (days)	—	—	0.7	11	23	28
Days with snowfall ≥ 2.5 cm (days)	—	—	—	0.0	0.8	2

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	72	68	69	67	64	56	36	37	42	58	70	71
Clear days (≤ 30% cloud)	3	4	3	3	5	6	16	16	13	8	3	3
Partly cloudy days (30–70%)	9	8	10	11	11	13	10	11	9	9	9	10
Cloudy days (≥ 70%)	19	16	18	15	15	11	5	5	8	14	18	18
Relative humidity (%)	90	83	75	67	62	58	53	51	56	68	83	89
Wind speed (m/s)	1.4	1.6	1.7	1.8	1.7	1.8	1.8	1.6	1.5	1.5	1.5	1.4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	72	68	69	67	64	56
Clear days (≤ 30% cloud)	3	4	3	3	5	6
Partly cloudy days (30–70%)	9	8	10	11	11	13
Cloudy days (≥ 70%)	19	16	18	15	15	11
Relative humidity (%)	90	83	75	67	62	58
Wind speed (m/s)	1.4	1.6	1.7	1.8	1.7	1.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	36	37	42	58	70	71
Clear days (≤ 30% cloud)	16	16	13	8	3	3
Partly cloudy days (30–70%)	10	11	9	9	9	10
Cloudy days (≥ 70%)	5	5	8	14	18	18
Relative humidity (%)	53	51	56	68	83	89
Wind speed (m/s)	1.8	1.6	1.5	1.5	1.5	1.4

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Yakima AP (NOAA GHCN station USW00024243), about 5 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 →