Weather by Month in Reykjavik
Monthly Climate Comparison
The biggest temperature swing occurs between September and October, as typical highs shift from 10.3°C / 50.5°F to 6.1°C / 42.9°F (about 4.2°C / 7.6°F).
Jan
COLD
Feb
COLD
Mar
COLD
Apr
COLD
May
COOL
Jun
COOL
Jul
COOL
Aug
COOL
Sep
COOL
Oct
COLD
Nov
COLD
Dec
COLD
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | -3.4°C | 1.2°C | COLD |
| February | -3.4°C | 1.3°C | COLD |
| March | -2.5°C | 2.6°C | COLD |
| April | 0.3°C | 5.8°C | COLD |
| May | 3.4°C | 9.3°C | COOL |
| June | 6.8°C | 12.4°C | COOL |
| July | 8.8°C | 14.1°C | COOL |
| August | 8.3°C | 13.4°C | COOL |
| September | 5.9°C | 10.3°C | COOL |
| October | 2°C | 6.1°C | COLD |
| November | -0.7°C | 3.1°C | COLD |
| December | -3.2°C | 1.3°C | COLD |
July has the warmest typical feels-like highs (12.1°C / 53.8°F), while January is coolest (-3.7°C / 25.4°F).
Jan
COLD
Feb
COLD
Mar
COLD
Apr
COLD
May
COLD
Jun
COOL
Jul
COOL
Aug
COOL
Sep
COLD
Oct
COLD
Nov
COLD
Dec
COLD
| Month | Low Feels Like | High Feels Like | Category |
|---|---|---|---|
| January | -8.6°C | -3.7°C | COLD |
| February | -8.6°C | -3.5°C | COLD |
| March | -7.4°C | -2.1°C | COLD |
| April | -4.2°C | 1.6°C | COLD |
| May | -0.4°C | 5.8°C | COLD |
| June | 4°C | 9.7°C | COOL |
| July | 6.5°C | 12.1°C | COOL |
| August | 5.8°C | 11.1°C | COOL |
| September | 2.3°C | 7.2°C | COLD |
| October | -2.2°C | 2.4°C | COLD |
| November | -5.5°C | -1.3°C | COLD |
| December | -8.2°C | -3.4°C | COLD |
September is wettest at 138.1 mm / 5.44 inches, while June is driest at 84 mm / 3.31 inches.
Jan
WET
Feb
WET
Mar
WET
Apr
MODERATE
May
MODERATE
Jun
MODERATE
Jul
MODERATE
Aug
MODERATE
Sep
WET
Oct
WET
Nov
MODERATE
Dec
WET
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | 62.3 mm | 130.1 mm | WET |
| February | 62.3 mm | 129.6 mm | WET |
| March | 62.3 mm | 120.3 mm | WET |
| April | 62.3 mm | 109.1 mm | MODERATE |
| May | 62.3 mm | 96.6 mm | MODERATE |
| June | 62.3 mm | 84 mm | MODERATE |
| July | 62.3 mm | 89 mm | MODERATE |
| August | 62.3 mm | 105.4 mm | MODERATE |
| September | 62.3 mm | 138.1 mm | WET |
| October | 62.3 mm | 127.4 mm | WET |
| November | 62.3 mm | 116 mm | MODERATE |
| December | 62.3 mm | 130.2 mm | WET |
June has the strongest peak UV (around index 5.8).
Jan
LOW
Feb
LOW-MOD
Mar
LOW-MOD
Apr
MODERATE
May
MODERATE
Jun
MODERATE
Jul
MODERATE
Aug
MODERATE
Sep
MODERATE
Oct
LOW-MOD
Nov
LOW
Dec
LOW
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 0.5 | LOW |
| February | 0 | 1.4 | LOW-MOD |
| March | 0 | 3 | LOW-MOD |
| April | 0 | 4.5 | MODERATE |
| May | 0 | 5.5 | MODERATE |
| June | 0 | 5.8 | MODERATE |
| July | 0 | 5.7 | MODERATE |
| August | 0 | 4.9 | MODERATE |
| September | 0 | 3.6 | MODERATE |
| October | 0 | 2 | LOW-MOD |
| November | 0 | 0.8 | LOW |
| December | 0 | 0.2 | LOW |
Daylight ranges from 4.4h in December to 20.8h in June.
Jan
SHORT
Feb
SHORT
Mar
BALANCED
Apr
LONG
May
LONG
Jun
LONG
Jul
LONG
Aug
LONG
Sep
LONG
Oct
SHORT
Nov
SHORT
Dec
SHORT
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 5.6h | SHORT |
| February | 0h | 8.6h | SHORT |
| March | 0h | 11.8h | BALANCED |
| April | 0h | 15.1h | LONG |
| May | 0h | 18.5h | LONG |
| June | 0h | 20.8h | LONG |
| July | 0h | 19.5h | LONG |
| August | 0h | 16.3h | LONG |
| September | 0h | 13h | LONG |
| October | 0h | 9.7h | SHORT |
| November | 0h | 6.5h | SHORT |
| December | 0h | 4.4h | SHORT |
October is most humid (84.2%), while May is driest (76.6%).
Jan
MUGGY
Feb
MUGGY
Mar
MUGGY
Apr
MUGGY
May
MUGGY
Jun
MUGGY
Jul
MUGGY
Aug
MUGGY
Sep
MUGGY
Oct
MUGGY
Nov
MUGGY
Dec
MUGGY
| Month | Baseline | Humidity (avg) | Category |
|---|---|---|---|
| January | 73.9% | 81.7% | MUGGY |
| February | 73.9% | 80.5% | MUGGY |
| March | 73.9% | 78.8% | MUGGY |
| April | 73.9% | 78.5% | MUGGY |
| May | 73.9% | 76.6% | MUGGY |
| June | 73.9% | 77.5% | MUGGY |
| July | 73.9% | 80.4% | MUGGY |
| August | 73.9% | 82.3% | MUGGY |
| September | 73.9% | 83.6% | MUGGY |
| October | 73.9% | 84.2% | MUGGY |
| November | 73.9% | 82.8% | MUGGY |
| December | 73.9% | 82.2% | MUGGY |
February has the strongest typical average wind (17.6 km/h / 10.9 mph), while July is calmest (11.8 km/h / 7.4 mph).
Jan
CALM
Feb
CALM
Mar
CALM
Apr
CALM
May
CALM
Jun
CALM
Jul
CALM
Aug
CALM
Sep
CALM
Oct
CALM
Nov
CALM
Dec
CALM
| Month | Baseline | Wind (avg) | Category |
|---|---|---|---|
| January | 9.5 km/h | 17.2 km/h | CALM |
| February | 9.5 km/h | 17.6 km/h | CALM |
| March | 9.5 km/h | 16.7 km/h | CALM |
| April | 9.5 km/h | 15.6 km/h | CALM |
| May | 9.5 km/h | 13.9 km/h | CALM |
| June | 9.5 km/h | 12.5 km/h | CALM |
| July | 9.5 km/h | 11.8 km/h | CALM |
| August | 9.5 km/h | 12.7 km/h | CALM |
| September | 9.5 km/h | 15.5 km/h | CALM |
| October | 9.5 km/h | 15.3 km/h | CALM |
| November | 9.5 km/h | 16.7 km/h | CALM |
| December | 9.5 km/h | 16.7 km/h | CALM |
February is windiest by P95 gust signal (87.2 km/h / 54.2 mph).
Jan
VERY WINDY
Feb
VERY WINDY
Mar
VERY WINDY
Apr
VERY WINDY
May
VERY WINDY
Jun
VERY WINDY
Jul
VERY WINDY
Aug
VERY WINDY
Sep
VERY WINDY
Oct
VERY WINDY
Nov
VERY WINDY
Dec
VERY WINDY
| Month | Baseline | Wind (gusts) | Category |
|---|---|---|---|
| January | 0 km/h | 83.5 km/h | VERY WINDY |
| February | 0 km/h | 87.2 km/h | VERY WINDY |
| March | 0 km/h | 79.2 km/h | VERY WINDY |
| April | 0 km/h | 72.7 km/h | VERY WINDY |
| May | 0 km/h | 67 km/h | VERY WINDY |
| June | 0 km/h | 59.4 km/h | VERY WINDY |
| July | 0 km/h | 58.3 km/h | VERY WINDY |
| August | 0 km/h | 60.1 km/h | VERY WINDY |
| September | 0 km/h | 73.4 km/h | VERY WINDY |
| October | 0 km/h | 73.4 km/h | VERY WINDY |
| November | 0 km/h | 77.8 km/h | VERY WINDY |
| December | 0 km/h | 82.8 km/h | VERY WINDY |
January has the most rain days (~20.4), while November has the fewest (~18). Rain days count the average number of days in a month with measurable rain (about 0.1 mm or more).
Jan
VERY FREQUENT
Feb
VERY FREQUENT
Mar
VERY FREQUENT
Apr
VERY FREQUENT
May
VERY FREQUENT
Jun
VERY FREQUENT
Jul
VERY FREQUENT
Aug
VERY FREQUENT
Sep
VERY FREQUENT
Oct
VERY FREQUENT
Nov
VERY FREQUENT
Dec
VERY FREQUENT
| Month | Baseline | Rain Days | Category |
|---|---|---|---|
| January | 17 days | 20.4 days | VERY FREQUENT |
| February | 17 days | 18.4 days | VERY FREQUENT |
| March | 17 days | 19.6 days | VERY FREQUENT |
| April | 17 days | 18.9 days | VERY FREQUENT |
| May | 17 days | 18.6 days | VERY FREQUENT |
| June | 17 days | 18.1 days | VERY FREQUENT |
| July | 17 days | 18.3 days | VERY FREQUENT |
| August | 17 days | 18.5 days | VERY FREQUENT |
| September | 17 days | 20.1 days | VERY FREQUENT |
| October | 17 days | 18 days | VERY FREQUENT |
| November | 17 days | 18 days | VERY FREQUENT |
| December | 17 days | 19.8 days | VERY FREQUENT |
September has the most heavy rain/washout risk days (~10). Heavy rain days are the average number of days likely to bring stronger downpours that can disrupt outdoor plans.
Jan
PERSISTENT
Feb
PERSISTENT
Mar
PERSISTENT
Apr
PERSISTENT
May
PERSISTENT
Jun
PERSISTENT
Jul
PERSISTENT
Aug
PERSISTENT
Sep
PERSISTENT
Oct
PERSISTENT
Nov
PERSISTENT
Dec
PERSISTENT
| Month | Baseline | Heavy Rain Days | Category |
|---|---|---|---|
| January | 0 days | 9 days | PERSISTENT |
| February | 0 days | 9 days | PERSISTENT |
| March | 0 days | 8 days | PERSISTENT |
| April | 0 days | 8 days | PERSISTENT |
| May | 0 days | 7 days | PERSISTENT |
| June | 0 days | 6 days | PERSISTENT |
| July | 0 days | 7 days | PERSISTENT |
| August | 0 days | 7 days | PERSISTENT |
| September | 0 days | 10 days | PERSISTENT |
| October | 0 days | 8 days | PERSISTENT |
| November | 0 days | 8 days | PERSISTENT |
| December | 0 days | 8 days | PERSISTENT |
January has the highest heat-risk day count (~0 days). Heat days are the average number of days that exceed our location-specific heat-risk threshold.
Jan
LOW
Feb
LOW
Mar
LOW
Apr
LOW
May
LOW
Jun
LOW
Jul
LOW
Aug
LOW
Sep
LOW
Oct
LOW
Nov
LOW
Dec
LOW
| Month | Baseline | Heat Days | Category |
|---|---|---|---|
| January | 0 days | 0 days | LOW |
| February | 0 days | 0 days | LOW |
| March | 0 days | 0 days | LOW |
| April | 0 days | 0 days | LOW |
| May | 0 days | 0 days | LOW |
| June | 0 days | 0 days | LOW |
| July | 0 days | 0 days | LOW |
| August | 0 days | 0 days | LOW |
| September | 0 days | 0 days | LOW |
| October | 0 days | 0 days | LOW |
| November | 0 days | 0 days | LOW |
| December | 0 days | 0 days | LOW |
Rain & Sunshine Patterns
Driest Months
#1 June
Best for: outdoor activities & sightseeing
#2 July
Best for: outdoor activities & sightseeing
#3 May
Best for: outdoor activities & sightseeing
Wettest Months
#1 September
Expect: possible showers, pack waterproofs
#2 December
Expect: possible showers, pack waterproofs
#3 January
Expect: possible showers, pack waterproofs
UV & Sun Protection Calendar
Jan
1
LOW
Feb
1
LOW-MOD
Mar
3
LOW-MOD
Apr
5
MODERATE
May
5
MODERATE
Jun
6
MODERATE
Jul
6
MODERATE
Aug
5
MODERATE
Sep
4
MODERATE
Oct
2
LOW-MOD
Nov
1
LOW
Dec
0
LOW
Extreme (11+)
Avoid sun during midday, use SPF 50+
Very High (8-10)
Essential sun protection required
High (6-7)
Use SPF 30+, wear hat & sunglasses
Moderate (3-5)
Sun protection recommended
Low-Moderate (1-2)
Minimal protection needed
Low (0)
No protection required
Daylight Hours
Daylight varies from 4.4 hours in December (winter) to 20.8 hours in June (summer), which is a difference of 16.4 hours.
Shortest Days
December
4.4h
Average Sunrise:11:10
Average Sunset:15:35
Plan daytime activities for midday when light is best. Early sunsets mean evening plans should account for darkness.
Longest Days
June
20.8h
Average Sunrise:03:03
Average Sunset:16:01
Extended daylight perfect for evening activities and late dining. You can fit more sightseeing into each day.
Wind & Humidity Overview
Wind Conditions
Average wind speed
Windiest months:
February (
18 km/h)
January (
17 km/h)
March (
17 km/h)
Packing tip: Conditions are generally calm, but a light layer is always handy.
Humidity Levels
Average humidity
81%
Most humid:
October (
84%)
Least humid:
May (
77%)
Packing tip: Choose breathable, natural fabrics like cotton or linen for comfort in humid conditions.
Seasonal Overview
Northern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
Winter
January, February, December
Avg High
Avg Low
Avg Rain
Cold conditions; pack warm layers and waterproofs
Spring
March, April, May
Avg High
Avg Low
Avg Rain
Warming trend with frequent showers; pack waterproofs
Summer
June, July, August
Avg High
Avg Low
Avg Rain
Comfortable temperatures; enjoy outdoor activities
Autumn
September, October, November
Avg High
Avg Low
Avg Rain
Wet season begins; bring rain gear
Risk Ranking Table
| Ranking Goal | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Lowest rain risk | Jun 6 risk days | May 7 risk days | Jul 7 risk days | Aug 7 risk days |
| Lowest heatwave risk | Jan 0 risk days | Feb 0 risk days | Mar 0 risk days | Apr 0 risk days |
| Lowest cold risk | Jul 23 risk days | Aug 23 risk days | Sep 28 risk days | Jun 29 risk days |
| Lowest wind disruption risk | Jul 58 km/h | Jun 59 km/h | Aug 60 km/h | May 67 km/h |
| Most comfortable evenings | Jul 38 / 100 | Aug 35 / 100 | Jun 32 / 100 | May 32 / 100 |
| Best outdoor reliability | Jun 99 / 100 | Jul 89 / 100 | Aug 87 / 100 | May 82 / 100 |
Monthly Details
Click any month for detailed weather information and packing advice.
Looking for the best time to visit?
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
View Best Time to VisitFrequently Asked Questions
When is Reykjavik warmest?
July is typically the warmest month in Reykjavik, with average high temperatures reaching around 14°C (57°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
When is Reykjavik coldest?
February is usually the coldest month, with average low temperatures dropping to around -3°C (27°F). Pack warm layers if visiting during this time, especially for evening activities.
When does Reykjavik get the most rain?
September typically sees the most rainfall in Reykjavik, averaging around 138mm (5.4 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
What is the driest month in Reykjavik?
June is typically the driest month, with average rainfall of just 84mm (3.3 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
How much does the temperature vary in Reykjavik throughout the year?
Temperatures in Reykjavik range from average lows of 2°C (35°F) to highs of 7°C (44°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Do I need sun protection when visiting Reykjavik?
Yes, sun protection is important in Reykjavik. UV levels can reach 6 during peak months, which is considered high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.