Best year time to visit City of Lake Oswego

General weather information about City of Lake Oswego

Average annual temperature is 12.4 °C

Absolute maximum temperature: 41.3 °C

Absolute minimum temperature: -6.6 °C

Number of sunny days: 167 days

Number of rainy days: 197 days

Number of snow days: 1 day

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* Weather data for City of Lake Oswego United States is based on climate observations for 2026 year

City of Lake Oswego air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.513.417.927.831.532.636.141.333.228.417.016.1
Average daytime temperature (°C)9.18.610.814.023.425.930.931.724.418.612.010.7
Average temperature (°C)5.53.85.38.715.917.621.923.117.413.08.07.6
Average night temperature (°C)2.80.71.85.010.111.114.516.312.49.55.25.3
Absolute minimum temperature (°C)-4.4-6.6-2.5-0.26.46.911.311.47.82.0-2.20.1

City of Lake Oswego monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.08.0
Daylight mean duration (h)9.210.411.913.514.915.615.314.112.511.09.58.8
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)3.65.16.26.610.812.713.611.68.86.65.43.0
Precipitation (mm)123120171216473421971125155290
Sunny days7935202426231614137
Rainy days241828251165814171724
Snow days010000000000

City of Lake Oswego - weather forecast by months

City of Lake Oswego weather in januaryCity of Lake Oswego weather in februaryCity of Lake Oswego weather in marchCity of Lake Oswego weather in aprilCity of Lake Oswego weather in mayCity of Lake Oswego weather in juneCity of Lake Oswego weather in julyCity of Lake Oswego weather in augustCity of Lake Oswego weather in septemberCity of Lake Oswego weather in octoberCity of Lake Oswego weather in novemberCity of Lake Oswego weather in december

Best time to visit City of Lake Oswego:

The best time to visit City of Lake Oswego during the most sunny months:

  • May — 10.8(h)
  • June — 12.7(h)
  • July — 13.6(h)
  • August — 11.6(h)

Months with the longest average daylight duration in City of Lake Oswego:

  • June — 15.6(h)
  • July — 15.3(h)

The largest precipitation sum in City of Lake Oswego is at

  • March — 171(mm)
  • April — 216(mm)
  • November — 155(mm)
  • December — 290(mm)

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    Frequently asked questions

    When is the best time to visit City of Lake Oswego?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit City of Lake Oswego.
    What is the weather like in City of Lake Oswego?
    See average temperature, rainfall and daylight hours for City of Lake Oswego by month in the table above.
    How many sunny days does City of Lake Oswego have?
    The monthly weather statistics above show sunshine and rainfall patterns for City of Lake Oswego throughout the year.