What is the hottest month in Riddle?

August is the warmest month in Riddle, with an average high of 88.8°F.

What is the coldest month in Riddle?

December is the coldest month in Riddle, with an average low of 36.7°F.

What month does Riddle get the most rain?

December is typically the wettest month in Riddle, with about 6.17 inches of precipitation.

What plant hardiness zone is Riddle in?

Riddle is approximately in USDA plant hardiness Zone 9a, based on the average annual extreme minimum temperature.

Has the climate in Riddle changed recently?

23.8% of Riddle's all-time daily heat records were set in the last decade (since 2015), compared to roughly 5% if records were evenly distributed over time.

Riddle, OR

Climate overview — based on NOAA 1991-2020 normals from RIDDLE, OR US.

Csa Hot-summer Mediterranean climate 9a USDA hardiness Zone 9a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Riddle has an annual average temperature of 56.7°F with about 31.1 inches of precipitation per year and 1.9 inches of snow. The warmest month is August (average high 88.8°F), and the coldest is December (average low 36.7°F). December is typically the wettest month (6.17 in) and July the driest (0.27 in). Snow typically falls from December through February.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

28°F

warmest to coldest month

Heating need

3,414

HDD/yr

Cooling need

432

CDD/yr

Best time to visit Riddle

Full guide →

Climate change signal

All-time records →

87 of 366 (23.8%) of Riddle's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1890s		0
1900s		0
1910s		18
1920s		30
1930s		41
1940s		26
1950s		8
1960s		14
1970s		19
1980s		43
1990s		35
2000s		28
2010s		49
2020s		55

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	52.7°F	36.9°F	44.8°F	4.72 in	0.5 in	19
February	57.1°F	37.2°F	47.2°F	3.35 in	0.7 in	17
March	61.5°F	38.8°F	50.2°F	3.39 in	0.1 in	18
April	66.2°F	41.4°F	53.8°F	2.53 in	—	16
May	73.6°F	46.6°F	60.1°F	1.86 in	—	12
June	79.5°F	51.1°F	65.3°F	0.98 in	—	6
July	88.2°F	55.3°F	71.7°F	0.27 in	—	2
August	88.8°F	54.0°F	71.4°F	0.28 in	—	2
September	83.6°F	48.5°F	66.0°F	0.71 in	—	5
October	71.0°F	43.3°F	57.1°F	2.25 in	—	12
November	57.9°F	40.7°F	49.3°F	4.57 in	—	19
December	50.6°F	36.7°F	43.7°F	6.17 in	0.6 in	20