Reykholt Weather in September
During September, Reykholt experiences low daytime temperatures of 12°C (54°F) and cooler nights around 5°C (41°F). Expect quite a bit of rainfall. Around 186 mm (7.3 in) is typical.
Rainfall in Reykholt in September
Analyzing past climate data, one can expect approximately 17 days of rain, averaging 186 mm (7.3 in). This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Reykholt in September
Daytime highs in Reykholt in September reach 12°C (54°F), with nights around 5°C (41°F). Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights fall to 5°C (41°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Reykholt in September
The month brings about 121 hours of sunlight, offering a comfortable mix of sun and overcast.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Reykholt. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Reykholt's climate page.
Reykholt Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
12°C (54°F)
Chance of Rain
57%
Precipitation
186 mm (7.3 in)
Rainy days
17 days
Humidity
79% *
Sunshine
121 hours *
Percentage Sunshine
30% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Reykholt typically stay consistent throughout September, with daily highs averaging around 12°C (54°F). Nights are cold, with lows typically ranging from 4°C (39°F) to 8°C (46°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 Reykholt in September
Browse day-by-day weather records for Reykholt spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Reykholt historical weather extremes in September
Based on 49 years of weather observations in Reykholt between 1976 and 2025, these are the recorded extremes.
- The warmest day in September was on September 1, 2006, with a maximum of 18°C (64°F).
- On September 20, 1990, Reykholt saw its coldest September day with temperatures maxing out at 2°C (36°F).
- Nighttime temperatures dropped to -3°C (27°F) on September 25, 2005, marking the coldest September night on record.
- Peak precipitation in September occurred on September 12, 2007, when 37 mm (1.5 in) of precipitation was measured.
Best Places in Iceland in September
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Reykholt in September
The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Reykholt 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 Iceland, check out our Reykholt's climate page.
Temperature Rainfall Sunshine Humidity
See the full Reykholt climate overview or explore weather in Iceland.
