Lohja Weather in September
September in Lohja averages 16°C (61°F) during the day and 9°C (48°F) at night. Quite a bit of rainfall is typical this month, with around 62 mm (2.4 in) on average. An umbrella is a good idea.
Rainfall in Lohja in September
Historically, September sees about 19 days of rain, with a monthly average of 62 mm (2.4 in). Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Lohja in September
Expect highs of 16°C (61°F) in Lohja in September, with nights dropping to around 9°C (48°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Lohja in September
The area enjoys a balanced 151 hours of sunlight, ensuring it's neither too overcast nor too sunny.For Lohja itself, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Lohja's climate page.
Lohja Temperature in September
Min Temperature
9°C (48°F)
Max Temperature
16°C (61°F)
Chance of Rain
62%
Precipitation
62 mm (2.4 in)
Rainy days
19 days
Humidity
84% *
Sunshine
151 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lohja typically drop from around 17°C (63°F) at the start of September to approximately 12°C (54°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 10°C (50°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Lohja in September
Browse day-by-day weather records for Lohja spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lohja historical weather extremes in September
The extremes listed below come from historical weather data collected in Lohja from 1976 through 2025.
- On September 3, 2002, temperatures climbed to 25°C (77°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 5°C (41°F), recorded on September 27, 1986.
- Nighttime temperatures dropped to -6°C (21°F) on September 30, 1993, marking the coldest September night on record.
Best Places in Finland in September
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Lohja in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Lohja in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Lohja's climate page.
Temperature Rainfall Sunshine Humidity
See the full Lohja climate overview or explore weather in Finland.
