Giresun, Turkey climate

Cfa Humid subtropical

Giresun has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 82°F, while the coldest is February averaging around 40°F at night. Around 55 inches of precipitation falls each year, peaking in October (8.1 inches) and easing off in April (2.7 inches).

☀️ Summers

Warm

Highs near 82°F in August.

About 1 days a year above 90 °F

❄️ Winters

Cool

Lows near 40°F in February.

About 5 freezing nights a year

🌧️ Rain

Wet

About 55 in of rain a year.

Wettest in October

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

Temperature & precipitation

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

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Giresun climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	50	51	55	58	66	76	81	82	76	68	62	55
Avg temp (°F)	46	46	49	53	61	70	76	77	71	64	56	50
Avg low (°F)	41	40	43	49	57	65	70	72	66	59	51	45
Precipitation (in)	5.4	3.3	4.5	2.7	3.0	3.7	4.1	2.7	6.1	8.1	6.4	5.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	50	51	55	58	66	76
Avg temp (°F)	46	46	49	53	61	70
Avg low (°F)	41	40	43	49	57	65
Precipitation (in)	5.4	3.3	4.5	2.7	3.0	3.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	81	82	76	68	62	55
Avg temp (°F)	76	77	71	64	56	50
Avg low (°F)	70	72	66	59	51	45
Precipitation (in)	4.1	2.7	6.1	8.1	6.4	5.3

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	14	13	15	13	13	11	10	10	11	15	12	13
Days with high ≥ 90°F (days)	—	—	—	—	—	0.1	0.1	0.6	0.1	0.1	—	—
Days with low ≤ 32°F (days)	2	2	0.5	0.1	—	—	—	—	—	—	—	0.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	14	13	15	13	13	11
Days with high ≥ 90°F (days)	—	—	—	—	—	0.1
Days with low ≤ 32°F (days)	2	2	0.5	0.1	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	10	11	15	12	13
Days with high ≥ 90°F (days)	0.1	0.6	0.1	0.1	—	—
Days with low ≤ 32°F (days)	—	—	—	—	—	0.7

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	74	73	75	71	64	55	48	47	49	58	63	71
Relative humidity (%)	77	77	76	75	77	76	75	75	75	75	74	76
Wind speed (mph)	6.6	6.5	5.2	4.0	3.6	4.2	4.6	4.6	4.8	4.9	5.2	6.0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	74	73	75	71	64	55
Relative humidity (%)	77	77	76	75	77	76
Wind speed (mph)	6.6	6.5	5.2	4.0	3.6	4.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	48	47	49	58	63	71
Relative humidity (%)	75	75	75	75	74	76
Wind speed (mph)	4.6	4.6	4.8	4.9	5.2	6.0

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 14 years of daily observations at Giresun, a weather station, inside the city. The underlying daily records come from NOAA's global station network.

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 →