2025 Compare Climate & Weather:
Sonoma, CA vs Heppner, OR

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Highlights

On average, there are 194 sunny days per year in Heppner. Sonoma averages 262 sunny days per year. The US average is 205 sunny days.

Heppner, Oregon gets 13.5 inches of rain, on average, per year. Sonoma, California gets 30.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Heppner averages 13.1 inches of snow per year. Sonoma averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Heppner, Oregon
Summer High: the July high is around 88 degrees
Winter Low: the January low is 25.8
Rain: averages 13.5 inches of rain a year
Snow: averages 13.1 inches of snow a year

Sonoma, California
Summer High: the July high is around 85.1 degrees
Winter Low: the January low is 37.9
Rain: averages 30.7 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

Heppner

The annual BestPlaces Comfort Index for Heppner is 7.3 (10=best), which means it is more comfortable than most places in Oregon.

7.3 / 10

June, September and August are the most pleasant months in Heppner, while December and January are the least comfortable months.

Sonoma

The annual BestPlaces Comfort Index for Sonoma is 8.4 (10=best), which means it is more comfortable than most places in California.

8.4 / 10

June, July and September are the most pleasant months in Sonoma, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Sonoma, CA	Heppner, OR
January	57° / 38°	44° / 26°
February	62° / 40°	48° / 27°
March	66° / 42°	56° / 33°
April	70° / 43°	63° / 36°
May	76° / 47°	70° / 43°
June	82° / 51°	78° / 48°
July	85° / 53°	88° / 53°
August	85° / 52°	88° / 52°
September	84° / 51°	79° / 45°
October	77° / 47°	66° / 37°
November	65° / 42°	51° / 31°
December	57° / 38°	42° / 25°

Hot, Freezing, Rainy, Snowy Days: Sonoma / Heppner

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	6 / 24	12 / 9	0 / 2
February	0 / 0	3 / 20	11 / 8	0 / 2
March	0 / 0	1 / 15	10 / 10	0 / 0
April	0 / 0	0 / 7	7 / 9	0 / 0
May	2 / 1	0 / 1	4 / 8	0 / 0
June	6 / 4	0 / 0	1 / 6	0 / 0
July	7 / 14	0 / 0	0 / 3	0 / 0
August	8 / 13	0 / 0	0 / 2	0 / 0
September	7 / 4	0 / 1	1 / 4	0 / 0
October	2 / 0	0 / 8	4 / 6	0 / 0
November	0 / 0	2 / 16	9 / 10	0 / 1
December	0 / 0	8 / 25	12 / 10	0 / 2

August is the hottest month for Sonoma with an average high temperature of 85.1°, which ranks it as cooler than most places in California. In Sonoma, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sonoma are October, May and June.

July is the hottest month for Heppner with an average high temperature of 88.0°, which ranks it as warmer than most places in Oregon. In Heppner, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Heppner are June, September and May.

December has the coldest nighttime temperatures for Sonoma with an average of 37.5°. This is about average compared to other places in California.

December has the coldest nighttime temperatures for Heppner with an average of 24.8°. This is colder than most places in Oregon.

In Sonoma, there are 31.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Heppner, there are 35.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Sonoma, there are 19.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Heppner, there are 116.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Sonoma, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

In Heppner, there are 1.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

December is the wettest month in Sonoma with 6.0 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 30.7 inches in Sonoma means that it is wetter than most places in California.

May is the wettest month in Heppner with 1.6 inches of rain, and the driest month is July with 0.4 inches. The wettest season is Summer with 32% of yearly precipitation and 15% occurs in Autumn, which is the driest season. The annual rainfall of 13.5 inches in Heppner means that it is drier than most places in Oregon.

December is the rainiest month in Sonoma with 12.0 days of rain, and July is the driest month with only 0.1 rainy days. There are 71.7 rainy days annually in Sonoma, which is rainier than most places in California. The rainiest season is Spring when it rains 49% of the time and the driest is Autumn with only a 2% chance of a rainy day.

November is the rainiest month in Heppner with 10.2 days of rain, and August is the driest month with only 2.4 rainy days. There are 84.5 rainy days annually in Heppner, which is less rainy than most places in Oregon. The rainiest season is Spring when it rains 32% of the time and the driest is Autumn with only a 13% chance of a rainy day.

There is rarely any recorded snowfall in Sonoma, ranking it as one of the least snowy places in California.

An annual snowfall of 13.1 inches in Heppner means that it is snowier than most places in Oregon.

Any measurable snowfall is a rare occurance in Sonoma.

December is the snowiest month in Heppner with 4.2 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Sonoma 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

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Reviews for Heppner 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

Start Your Review of Heppner

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2025 Compare Climate & Weather:
Sonoma, CA vs Heppner, OR

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sonoma / Heppner

December has the coldest nighttime temperatures for Sonoma with an average of 37.5°. This is about average compared to other places in California.

December has the coldest nighttime temperatures for Heppner with an average of 24.8°. This is colder than most places in Oregon.

In Sonoma, there are 31.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Heppner, there are 35.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Sonoma, there are 19.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Heppner, there are 116.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Sonoma, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

In Heppner, there are 1.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

There is rarely any recorded snowfall in Sonoma, ranking it as one of the least snowy places in California.

An annual snowfall of 13.1 inches in Heppner means that it is snowier than most places in Oregon.

Any measurable snowfall is a rare occurance in Sonoma.

December is the snowiest month in Heppner with 4.2 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Sonoma 2 Reviews

Reviews for Heppner 2 Reviews

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2025 Compare Climate & Weather:Sonoma, CA vs Heppner, OR

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Sonoma / Heppner

December has the coldest nighttime temperatures for Sonoma with an average of 37.5°. This is about average compared to other places in California.December has the coldest nighttime temperatures for Heppner with an average of 24.8°. This is colder than most places in Oregon.

In Sonoma, there are 31.9 days annually when the high temperature is over 90°, which is cooler than most places in California.In Heppner, there are 35.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Sonoma, there are 19.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.In Heppner, there are 116.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Sonoma, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.In Heppner, there are 1.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

There is rarely any recorded snowfall in Sonoma, ranking it as one of the least snowy places in California.An annual snowfall of 13.1 inches in Heppner means that it is snowier than most places in Oregon.

Any measurable snowfall is a rare occurance in Sonoma.December is the snowiest month in Heppner with 4.2 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Sonoma 2 Reviews

Reviews for Heppner 2 Reviews

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2025 Compare Climate & Weather:
Sonoma, CA vs Heppner, OR

December has the coldest nighttime temperatures for Sonoma with an average of 37.5°. This is about average compared to other places in California.

December has the coldest nighttime temperatures for Heppner with an average of 24.8°. This is colder than most places in Oregon.

In Sonoma, there are 31.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Heppner, there are 35.9 days annually when the high temperature is over 90°, which is hotter than most places in Oregon.

In Sonoma, there are 19.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in California.

In Heppner, there are 116.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Sonoma, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

In Heppner, there are 1.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

There is rarely any recorded snowfall in Sonoma, ranking it as one of the least snowy places in California.

An annual snowfall of 13.1 inches in Heppner means that it is snowier than most places in Oregon.

Any measurable snowfall is a rare occurance in Sonoma.

December is the snowiest month in Heppner with 4.2 inches of snow, and 5 months of the year have significant snowfall.