Capital Region · Iceland
Reykjavík in September
In September, Reykjavík averages a daytime high of 10 °C and a night-time low of 5 °C, with about 111 mm of rain over the month. Reykjavík has no month that is both mild and dry by the measure used here.
- Average high
- 10 °C
- Average low
- 5 °C
- Rain in the month
- 111 mm
- Daylight on 15 Sep
- 12 h 40 min
- Comfortable month
- No
- Places to stay
- 75
When to go
How September compares with the rest of the year in Reykjavík
September is the 4th warmest month in Reykjavík by average daytime high; across the year the highs run from 1 °C to 14 °C and the lows from -4 °C to 8 °C. By day, September is 3 °C cooler than August, and October is 4 °C cooler than September.
September brings 111 mm of rain, more than the monthly average of 89 mm (1065 mm a year); it is the 2nd wettest month.
On 15 September the sun is up for about 12 h 40 min, against 4 h 10 min at the shortest and 21 h at the longest point of the year (calculated from the latitude, sunrise to sunset).
| Month | High | Low | Rain | Comfortable |
|---|---|---|---|---|
| January | 1 °C | -4 °C | 106 mm | |
| February | 2 °C | -4 °C | 110 mm | |
| March | 2 °C | -3 °C | 96 mm | |
| April | 5 °C | -1 °C | 66 mm | |
| May | 9 °C | 2 °C | 65 mm | |
| June | 12 °C | 6 °C | 52 mm | |
| July | 14 °C | 8 °C | 65 mm | |
| August | 13 °C | 7 °C | 78 mm | |
| September | 10 °C | 5 °C | 111 mm | |
| October | 6 °C | 1 °C | 102 mm | |
| November | 3 °C | -2 °C | 100 mm | |
| December | 2 °C | -4 °C | 114 mm |
Comfortable means average daytime high between 18 °C and 29 °C and under 80 mm of rain in the month. Averages for 1991–2020 over the surrounding area, a grid square about 50 km across, so a coast or a nearby mountain can make the town itself warmer or cooler. Data: CRU TS v4.10, Climatic Research Unit, University of East Anglia (Open Database License).
When to go
Is September a good time to visit Reykjavík?
Not by the measure used here: the average high of 10 °C is below 18 °C and about 111 mm of rain is 80 mm or more. No month in Reykjavík meets it.
The measure is about weather for a city stay only; it says nothing about events, school holidays or prices.
Where to stay
Where to stay in Reykjavík
This guide lists 75 places to stay in Reykjavík, hotels recorded in Wikidata. By straight-line distance from the centre: under 1 km, 43; 1–3 km, 20; 3–10 km, 11; 10 km or more, 1.
Sources: climate from CRU TS v4.10 (Climatic Research Unit, University of East Anglia; Open Database License), 1991–2020 averages; day length calculated from the latitude; places to stay from each operator's own public pages and Wikidata. How this guide is made.