ReykjavíkIceland · Europe · September

September climate

CityCoastalAdventure

September in Reykjavík

Iceland · Europe

Cold days.

Some tradeoffs

Early to mid

Daytime high

50°F

Lows around 45°F

Rain

Rain most days

Sun

4 h/day

Air feel

Very dry

Sea temp

50°F

Too cold for swimming

When to visit

Month-by-month fit

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Temperature

Cold by day, cold at night.

50°Ftypical September high

Typical range

Precipitation

It rains on most days. About 18 wet days, more than in most months.

60%wet-day frequency

Precip amountWet-day chanceSnowfall

Sunshine

Sunshine is limited, with cloud often dominating.

4.2 hSeptember sunshine

Heat & humidity by month

Humidity is rarely noticeable in the cool air.

Very drySeptember Heat feel

Hourly temperature pattern

In September, afternoons feel about 39° and nights feel near 37°.

FreezingVery coldColdNight hours

Clear sky

Mostly cloudy skies this month.

24%September Clear sky

Clear skyCloud

Wind pattern

Breezy September days can feel brisker in open spots.

14 mphSeptember Breezy

Sea temperature

50°FSeptember sea temp

More detailIncludes daypart comfort

Typical September day

September late afternoons are around 49°F, and early evening stays near 48°F.

Avg temp Typical range

Morning47°F

Rain37%

Cloud75%

Humid airLow

Sun intensityMinimal

Midday49°F

Rain39%

Cloud77%

Humid airLow

Sun intensityLow

Late afternoon49°F

Rain40%

Cloud78%

Humid airLow

Sun intensityLow

Early evening48°F

Rain36%

Cloud75%

Humid airLow

Sun intensityMinimal

Best window

Data table

View month-by-month numbers

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44

Similar climates

Want a side-by-side climate view? Compare Reykjavík with Tromso.

Climate data notePlanning guidance, not a forecast

Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.

Sunshine: source type is not yet identified at metric level.

Local microclimates can vary by beach, neighborhood, trail, or elevation.

Last updated: Jun 1, 2026

Data & methodology

Month

High°F

Low°F

Rainin

Wet days

Sunh

Humidity%

Sea°F

Jan

4.8

0.9

Feb

4.7

1.8

Mar

4.5

3.6

Apr

3.7

4.7

May

3.3

6.2

Jun

2.7

5.4

Jul

3.0

5.5

Aug

3.8

5.0

Sep

5.5

4.2

Oct

4.9

2.7

Nov

4.6

1.3

Dec

4.8

0.4

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44

Month	High°F	Low°F	Rainin	Wet days	Sunh	Humidity%	Sea°F
Jan	38	32	4.8	19	0.9	78	44
Feb	37	31	4.7	17	1.8	77	43
Mar	38	32	4.5	18	3.6	76	43
Apr	42	36	3.7	16	4.7	77	43
May	46	40	3.3	14	6.2	77	45
Jun	51	46	2.7	13	5.4	80	48
Jul	54	49	3.0	13	5.5	83	51
Aug	54	49	3.8	14	5.0	83	53
Sep	50	45	5.5	18	4.2	81	50
Oct	44	39	4.9	16	2.7	80	47
Nov	40	35	4.6	17	1.3	78	46
Dec	38	33	4.8	18	0.4	79	44