Bonneville, Oregon

Bonneville is an unincorporated community in Multnomah County, Oregon, United States, on Interstate 84 and the Columbia River. Bonneville is best known as the site of Bonneville Dam. North Bonneville, Washington is across the river.

Bonneville, Oregon
Unincorporated community
Historic incubation building at the Bonneville Hatchery
Bonneville Show map of Oregon Bonneville Show map of the United States
Coordinates: 45°38′09″N 121°57′07″W
Country	United States
State	Oregon
County	Multnomah
Elevation [1]	52 ft (16 m)
Time zone	UTC-8 (Pacific (PST))
• Summer (DST)	UTC-7 (PDT)
ZIP code	97014
Area codes	458 and 541
GNIS feature ID	1138422[1]

For decades before the dam was built, Bonneville was popular as a picnic spot for people living along the Columbia River between Portland and The Dalles, and the railroad company maintained an "eating house" for travelers there.^[2] Bonneville railroad station was named for explorer Benjamin Bonneville.^[2] The name "Bonneville" did not appear on maps until the late 1880s.^[3] Bonneville post office was established in 1900.^[2]

Climate

Bonneville has a warm-summer Mediterranean climate (Köppen Csb).

Climate data for Bonneville Dam (1991–2020 normals, extremes 1937–present)
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Record high °F (°C)	64 (18)	68 (20)	75 (24)	88 (31)	98 (37)	111 (44)	107 (42)	107 (42)	100 (38)	86 (30)	71 (22)	65 (18)	107 (42)
Mean maximum °F (°C)	56.6 (13.7)	57.9 (14.4)	67.5 (19.7)	77.2 (25.1)	85.8 (29.9)	90.8 (32.7)	96.5 (35.8)	96.2 (35.7)	90.8 (32.7)	77.0 (25.0)	62.8 (17.1)	56.7 (13.7)	100.2 (37.9)
Mean daily maximum °F (°C)	42.7 (5.9)	47.2 (8.4)	53.3 (11.8)	59.4 (15.2)	66.5 (19.2)	71.6 (22.0)	79.0 (26.1)	79.7 (26.5)	74.2 (23.4)	62.4 (16.9)	50.1 (10.1)	42.4 (5.8)	60.7 (15.9)
Daily mean °F (°C)	38.5 (3.6)	41.3 (5.2)	45.6 (7.6)	50.8 (10.4)	57.0 (13.9)	61.9 (16.6)	68.1 (20.1)	68.6 (20.3)	63.6 (17.6)	54.5 (12.5)	45.0 (7.2)	38.5 (3.6)	52.8 (11.6)
Mean daily minimum °F (°C)	34.3 (1.3)	35.5 (1.9)	38.0 (3.3)	42.2 (5.7)	47.6 (8.7)	52.3 (11.3)	57.1 (13.9)	57.5 (14.2)	53.1 (11.7)	46.6 (8.1)	39.8 (4.3)	34.7 (1.5)	44.9 (7.2)
Mean minimum °F (°C)	24.6 (−4.1)	26.8 (−2.9)	30.7 (−0.7)	35.0 (1.7)	39.2 (4.0)	45.4 (7.4)	49.9 (9.9)	50.5 (10.3)	45.7 (7.6)	38.1 (3.4)	30.7 (−0.7)	25.5 (−3.6)	20.3 (−6.5)
Record low °F (°C)	2 (−17)	7 (−14)	20 (−7)	28 (−2)	31 (−1)	37 (3)	43 (6)	42 (6)	34 (1)	29 (−2)	9 (−13)	0 (−18)	0 (−18)
Average precipitation inches (mm)	11.31 (287)	8.67 (220)	9.13 (232)	6.47 (164)	4.08 (104)	3.21 (82)	0.60 (15)	0.90 (23)	2.62 (67)	7.30 (185)	12.48 (317)	13.45 (342)	80.22 (2,038)
Average snowfall inches (cm)	3.5 (8.9)	3.4 (8.6)	0.3 (0.76)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.2 (0.51)	2.9 (7.4)	10.3 (26)
Average precipitation days (≥ 0.01 in)	21.6	18.2	20.2	18.8	14.5	11.2	4.2	3.7	7.8	15.4	21.1	22.1	178.8
Average snowy days (≥ 0.1 in)	1.6	1.2	0.2	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.1	1.4	4.5
Source: NOAA[4][5]