Grindavík in september: average Weather, Temperature and Climate
Weather in Grindavík in september 2025
The weather in Grindavík in the month of september comes from statistical datas on the past years. You can view the weather statistics for all the month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
bad weather 11.1cm
Weather at 6am
50°F
Moderate rain at times
34% of time
24%
17%
16%
Weather at 12pm
50°F
Moderate rain at times
34% of time
20%
19%
15%
Weather at 6pm
50°F
Moderate rain at times
32% of time
23%
19%
18%
Weather at 3am
50°F
34%
19%
19%
17%
Evolution of daily average temperature and precipitation in Grindavík in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Grindavík in september.
The climate of Grindavík in september is bad
The weather in september in Grindavík is wet (with 8in of rainfall over 13 days). The weather's not getting better compared to the previous month since in august there is an average of 4.9in of rainfall over 7 days.
The climate is quite cold in this city september, but it is endurable by dressing warm. The thermometer averaged maximum of 52°F. In the morning the temperature drops to 49°F. Thus, the mean temperature average in september in Grindavík is 50°F. Note that seasonal normals are in contrast with those observed in Grindavík in september with a maximum record of 59°F in 2010 and a minimum record of 36°F in 2020.
In september in Grindavík, the days on average last 13:01. Sunrise is at 06:54 and sets at 19:55.
With a bad climate, the month of september is not the best time to go in this city in Iceland.
Seasonal average climate and temperature of Grindavík in september
Check below seasonal norms These statistics are set from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 50°F | ||||
| Highest temperature | 52°F | ||||
| Lowest temperature | 49°F | ||||
| Highest record temperature | 59°F (2010) | ||||
| Lowest record temperature | 36°F (2020) | ||||
| Sea temperature | |||||
| Average sea temperature | 51°F | ||||
| Lowest sea temperature | 48°F | ||||
| Highest sea temperature | 53°F | ||||
| Wind | |||||
| Wind speed | 35km/h | ||||
| Wind temperature | 43°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 8in | ||||
| Number of days with rainfall | 13 day(s) (42%) | ||||
| Record daily rainfall | 2.8in (2019) | ||||
| Snowfall | 11.1cm | ||||
| Other climate data | |||||
| Humidity | 83% | ||||
| Visibility | 8.85km | ||||
| Cloud cover | 64% | ||||
| UV index | 3 | ||||
| Daily sunshine hours | 9 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:54 | ||||
| Time of sunset | 19:55 | ||||
| Length of day | 13:01 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | bad | ||||
How was the weather last september?
Here is the day by day recorded weather in Grindavík in september 2024:
50°F to 52°F
50°F to 52°F
45°F to 50°F
45°F to 49°F
50°F to 52°F
49°F to 50°F
49°F to 50°F
45°F to 47°F
36°F to 43°F
40°F to 43°F
36°F to 47°F
38°F to 50°F
40°F to 49°F
41°F to 49°F
41°F to 47°F
41°F to 50°F
49°F to 50°F
45°F to 50°F
40°F to 47°F
40°F to 49°F
47°F to 49°F
47°F to 50°F
45°F to 47°F
41°F to 47°F
38°F to 47°F
36°F to 45°F
38°F to 43°F
38°F to 45°F
41°F to 45°F
36°F to 43°F
Map: other cities in Iceland in september
Cities near Grindavík:
| Vogar in september | bad weather |
| Keflavík in september | bad weather |
| Suðurnesjabær in september | bad weather |
| Kopavogur in september | bad weather |
| Reykjavík in september | bad weather |
| Seltjarnarnes in september | bad weather |
| Mosfellsbaer in september | bad weather |
| Akranes in september | bad weather |
| Hveragerdi in september | bad weather |
| Selfoss in september | bad weather |
| Thingvellir in september | bad weather |
| Borgarnes in september | bad weather |
Click over cities on the map for information about the weather in september.
Grindavík
perfect weather
good
tolerable
bad
very bad
Weather data for Grindavík in september:
Weather data for Grindavík for september are derived from an average of the weather forecast since 2009 in Grindavík. There is a margin of error and these forecasts are to be considered as general information only. The weather in Grindavík can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Grindavík.