Portland (IN) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Portland.
Climate overview of Portland
Portland, Indiana, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 29°C (84°F) in July, while winters cool to 1°C (34°F) in January.
Rain/snowfall is high, totalling around 1100 mm (43 in) per year. June is the wettest month and January the driest. The city also experiences warm summers and very cold winters. The most sunshine falls in July, with an average of 11.5 hours of daily sunshine.
Portland Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Portland - and find the best time to visit.
Monthly Temperature in Portland
Depending on the time of the year, temperatures range from comfortable to very cold in Portland. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in July, the warmest time of the year, to a very cold 1°C (34°F) during cooler months like January.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -9°C (16°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Portland
Portland has a relatively rain/snowy climate with high precipitation levels, averaging 1100 mm (43 in) of rain/snowfall annually. While rainfall varies throughout the year, each season offers its own charm. June brings wetter days averaging 134 mm (5.3 in) of precipitation, spread over 14 rainy days.
In contrast, the driest month January experiences a drier climate, with about 65 mm (2.6 in) of snow/rainfall spread across 11 snowy/rainy days. For more details, please visit our Portland Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Portland
Seasonal changes in sunshine hours are quite dramatic in Portland. While July receives considerable daily sunshine with up to 11.5 hours, December marks the darkest time of the year, where sunshine is scarce with only 3.5 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Portland by Month
The relative humidity is high throughout the year in Portland.
The city experiences its highest humidity in December, reaching 77%. In May, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Portland
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and September
- Warmest weather: June, July and August
- Most sunshine: June and July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Portland
What is the best time to visit Portland?
July and September typically offer the most optimal weather in Portland. In contrast, January, February, March, November and December tend to have less optimal conditions. Portland has warm summers and very cold winters.
What temperatures can I expect in Portland?
Daytime highs range from 1°C (34°F) in January to 29°C (84°F) in July. Nighttime lows range from -9°C (16°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Portland get?
Annual rainfall is around 1100 mm (43 in). June is the wettest month with 134 mm (5.3 in), while January is the driest with 65 mm (2.6 in).
How sunny is Portland?
Portland receives around 2,779 hours of sunshine per year. July is the sunniest month with 345 hours, while December is the cloudiest with just 106 hours. Overall, Portland enjoys abundant sunshine.
Portland 3-Day Forecast
Portland (IN) 3-Day Forecast
Portland on the map
Portland is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.