Sisters
Oregon, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Sisters, OR

January, like December, in Sisters, Oregon, is another cold winter month, with average temperature varying between 41.2°F (5.1°C) and 21.4°F (-5.9°C). In Sisters, the average high-temperature is relatively the same as in December - a still wintry 41.2°F (5.1°C). Weather in January »
The last month of the winter, February, is a frosty month in Sisters, Oregon, with temperature in the range of an average low of 23.4°F (-4.8°C) and an average high of 45.1°F (7.3°C). In February, the average high-temperature is almost the same as in January - a frosty 45.1°F (7.3°C). Weather in February »

March, the first month of the spring, in Sisters, is a cool month, with average temperature fluctuating between 51.1°F (10.6°C) and 25.9°F (-3.4°C). In Sisters, the average high-temperature marginally rises, from a frosty 45.1°F (7.3°C) in February, to a cool 51.1°F (10.6°C). Weather in March »

April is a mild spring month in Sisters, Oregon, with average temperature varying between 57°F (13.9°C) and 28.4°F (-2°C). In Sisters, the average high-temperature in April slightly increases, from a fresh 51.1°F (10.6°C) in March, to a mild 57°F (13.9°C). Weather in April »

May, the last month of the spring, in Sisters, is a comfortable month, with average temperature fluctuating between 65.5°F (18.6°C) and 33.8°F (1°C). In May, the average high-temperature marginally rises, from a mild 57°F (13.9°C) in April, to an enjoyable 65.5°F (18.6°C). Weather in May »

The first month of the summer, June, is a warm month in Sisters, Oregon, with average temperature fluctuating between 74.5°F (23.6°C) and 39°F (3.9°C). In June, the average high-temperature rises, from an enjoyable 65.5°F (18.6°C) in May, to a warm 74.5°F (23.6°C). Weather in June »

July, like June, in Sisters, Oregon, is a moderately hot summer month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 84.4°F (29.1°C). With an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 42.4°F (5.8°C), July is the warmest month. Weather in July »

The last month of the summer, August, is also a moderately hot month in Sisters, Oregon, with average temperature ranging between max 83.5°F (28.6°C) and min 41.7°F (5.4°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 83.5°F (28.6°C). Weather in August »

The first month of the autumn, September, is also a moderately hot month in Sisters, Oregon, with average temperature fluctuating between 75.4°F (24.1°C) and 35.4°F (1.9°C). In September, the average high-temperature marginally drops, from a warm 83.5°F (28.6°C) in August, to a still moderately hot 75.4°F (24.1°C). Weather in September »

October, the same as September, is another enjoyable autumn month in Sisters, Oregon, with average temperature fluctuating between 29.3°F (-1.5°C) and 63°F (17.2°C). In October, the average high-temperature drops, from a moderately hot 75.4°F (24.1°C) in September, to a comfortable 63°F (17.2°C). Weather in October »

The last month of the autumn, November, is also a frosty month in Sisters, Oregon, with average temperature ranging between max 47.5°F (8.6°C) and min 25.9°F (-3.4°C). In Sisters, the average high-temperature plummets, from a comfortable 63°F (17.2°C) in October, to a frosty 47.5°F (8.6°C). Weather in November »

December, the first month of the winter, in Sisters, is also a wintry month, with average temperature ranging between max 40.5°F (4.7°C) and min 20.8°F (-6.2°C). The coldest month is December, with an average high-temperature of 40.5°F (4.7°C) and an average low-temperature of 20.8°F (-6.2°C). Weather in December »

How many days does it rain in Sisters?

In Sisters, Oregon, during the entire year, the rain falls for 72 days and collects up to 13.5" (342.9mm) of precipitation.

When does it snow in Sisters?

January through April, October through December are months with snowfall in Sisters, Oregon.

How much does it snow in Sisters?

In Sisters, Oregon, during the entire year, snow aggregates up to 30.1" (764.5mm).

When does it snow the most in Sisters?

The month with the most snowfall is January when 8.3" (210.8mm) of snow is typically aggregated.

When are the longest days in Sisters?

The month with the longest days in Sisters, Oregon, is June, with an average of 15.5h of daylight.

What is the warmest month in Sisters?

With an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 42.4°F (5.8°C), July is the warmest month in Sisters, Oregon.

What is the driest month in Sisters?

July is the month with the least rainfall in Sisters. Rain falls for 2 days and accumulates 0.4" (9.7mm) of precipitation.

What is the coldest month in Sisters?

The coldest month in Sisters is December, with an average high-temperature of 40.5°F (4.7°C) and an average low-temperature of 20.8°F (-6.2°C).

What is the wettest month in Sisters?

The month with the most rainfall in Sisters, Oregon, is December when the rain falls for 9 days and typically aggregates up to 2.3" (57.7mm) of precipitation.

What is the month with the shortest days in Sisters?

December has the shortest days of the year in Sisters, with an average of 8.9h of daylight.
Average temperature - Sisters, OR
Average rainfall - Sisters, OR

The wettest month (with the highest rainfall) is December (2.3").
Driest months (with the lowest rainfall) are July, August and September (0.4").

Average rainfall days - Sisters, OR
Average snowfall - Sisters, OR
Average daylight - Sisters, OR