Dunoon, United Kingdom experiences average highs of 12°C (54°F) and lows of 7°C (45°F) throughout the year. Rainfall is frequent, averaging about 17 rainy days per month. Average highs have warmed by 0.9°C (1.6°F) across the available records.
Dunoon, United Kingdom Weather & Climate 2026
Monthly climate averages for Dunoon, United Kingdom. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Nov 
Wetter season: Feb–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
3.8/10
Best: May, June, July, August, September
UV Index
3
Low
Temperature 12°C / 7°C
Feels Like 9°C / 4°C
Rainy Days 17
Rainfall 139 mm
Sunshine 7 h
Humidity 85%
Wind Speed 21 km/h
Dew Point 7°C
Snow Days 4 days
Frost Days 5 days
Hottest Month
17°C
July
Avg Low12°C
Rain17days
Coldest Month
2°C
January
Avg High6°C
Rain17days
Driest Month
13days
April
Avg High11°C
Avg Low4°C
Windiest Month
26 km/h
February (Gusts 60)
Sea Temperature
8°C – 15°C
Warmest water: August (
15.1°C
)
Worst Time to Visit
Consider avoiding January, February, November, December due to very cold temperatures, heavy rainfall.
Sun Position
Sunrise 04:35
Daylight 17.6h
Sunset 22:08
Live conditions—
Dunoon on the map · live conditions
Dunoon, United Kingdom
- Continent
- Europe
- Country
- United Kingdom
- City
- Dunoon
- Population
- 8.2K
- Coordinates
- 55.95°, -4.93°
Seasonal Breakdown
Spring
Mar–May
Avg High 11°C
Avg Low 5°C
Rain 14 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 17°C
Avg Low 12°C
Rain 18 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 12°C
Avg Low 8°C
Rain 18 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 7°C
Avg Low 3°C
Rain 18 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 6°C / 2°C . Feb: 7°C / 3°C . Mar: 9°C / 3°C . Apr: 11°C / 4°C . May: 15°C / 8°C . Jun: 17°C / 11°C . Jul: 17°C / 12°C . Aug: 17°C / 12°C . Sep: 15°C / 10°C . Oct: 12°C / 8°C . Nov: 9°C / 5°C . Dec: 7°C / 3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 148 mm. Feb: 170 mm. Mar: 125 mm. Apr: 75 mm. May: 90 mm. Jun: 118 mm. Jul: 119 mm. Aug: 157 mm. Sep: 149 mm. Oct: 184 mm. Nov: 149 mm. Dec: 179 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 89%. Feb: 86%. Mar: 84%. Apr: 79%. May: 79%. Jun: 81%. Jul: 84%. Aug: 85%. Sep: 85%. Oct: 87%. Nov: 89%. Dec: 91%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 26 km/h . Mar: 21 km/h . Apr: 20 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 18 km/h . Aug: 19 km/h . Sep: 21 km/h . Oct: 22 km/h . Nov: 21 km/h . Dec: 22 km/h .
Sunshine
Sunshine
Sunshine: Jan: 3h. Feb: 5h. Mar: 7h. Apr: 9h. May: 11h. Jun: 10h. Jul: 10h. Aug: 9h. Sep: 7h. Oct: 5h. Nov: 4h. Dec: 2h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 9°C . Feb: 8°C . Mar: 8°C . Apr: 10°C . May: 12°C . Jun: 13°C . Jul: 14°C . Aug: 15°C . Sep: 15°C . Oct: 14°C . Nov: 12°C . Dec: 10°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 1. Mar: UV 3. Apr: UV 4. May: UV 5. Jun: UV 5. Jul: UV 5. Aug: UV 5. Sep: UV 3. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 6 days. Feb: 7 days. Mar: 3 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 5 days.
Climate Trends
Average highs have warmed by 0.9°C (1.6°F) across the available records. Average rainfall is trending wetter by about 13 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 18°C | Jul · 17°C |
| Coldest month | Jan 2025 · 2°C | Jan · 2°C |
| Wettest month | Dec 2025 · 236 mm | Oct · 184 mm |
| Windiest month | Feb 2025 · 24 km/h | Feb · 26 km/h |
Month-by-Month Weather Table
January
Poor 
February
Wet March
Poor April
Poor May best
Fair June best
Good July best
Fair August best
Wet September best
Fair October
Wet November
Poor December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 6°C / 2°C | 3°C / -2°C | 17days (148 mm) Wet | 3h Poor | 89% Very Muggy | 0.7 Low | Poor | View Details |
| February | 7°C / 3°C | 3°C / -2°C | 19days (170 mm) Wet | 4.8h Fair | 86% Very Muggy | 1.3 Low | Wet | View Details |
| March | 9°C / 3°C | 5°C / -1°C | 17days (125 mm) Wet | 6.8h Fair | 84% Humid | 2.5 Moderate | Poor | View Details |
| April | 11°C / 4°C | 8°C / 1°C | 13days (75 mm) Wet | 9.2h Good | 79% Humid | 3.8 Moderate | Poor | View Details |
| May best | 15°C / 8°C | 13°C / 5°C | 13days (90 mm) Wet | 10.6h Excellent | 79% Humid | 4.9 Moderate | Fair | View Details |
| June best | 17°C / 11°C | 15°C / 9°C | 17days (118 mm) Wet | 10.4h Excellent | 81% Humid | 5.3 High | Good | View Details |
| July best | 17°C / 12°C | 16°C / 11°C | 17days (119 mm) Wet | 9.9h Good | 84% Humid | 4.7 Moderate | Fair | View Details |
| August best | 17°C / 12°C | 16°C / 11°C | 20days (157 mm) Wet | 9.2h Good | 85% Humid | 4.5 Moderate | Wet | View Details |
| September best | 15°C / 10°C | 14°C / 8°C | 17days (149 mm) Wet | 7h Good | 85% Humid | 3.2 Moderate | Fair | View Details |
| October | 12°C / 8°C | 10°C / 5°C | 19days (184 mm) Wet | 4.9h Fair | 87% Very Muggy | 1.6 Low | Wet | View Details |
| November | 9°C / 5°C | 6°C / 1°C | 17days (149 mm) Wet | 3.6h Poor | 89% Very Muggy | 0.8 Low | Poor | View Details |
| December | 7°C / 3°C | 4°C / 0°C | 19days (179 mm) Wet | 2.2h Poor | 91% Very Muggy | 0.5 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Dunoon are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Dunoon, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Dunoon is July, with average daytime highs of 17°C (63°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Dunoon is January, with average overnight lows of 2°C (36°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Dunoon is October, averaging 184mm of precipitation across 19 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Dunoon runs through August, February, October, December, with the heaviest rainfall in August. Based on 10-year averages for Dunoon.
Dunoon receives approximately 82 sunshine hours per year. The sunniest month is May with around 11 hours. Based on climate data for Dunoon.
The least favorable months to visit Dunoon are January, February, November, December, primarily due to very cold temperatures, heavy rainfall. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Dunoon is 3, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Dunoon is 85%, classified as humid. High humidity makes warm temperatures feel significantly hotter — lightweight, breathable clothing is recommended.
Sea temperatures in Summer average 12°C (54°F), which most swimmers will find too cold without a wetsuit.
Yes, Dunoon receives snow. Months with snowfall average 4 snow days and 6 cm (2 in) of accumulation, with about 5 frost days during winter.
Average wind speeds in Dunoon are 21 km/h (13 mph). The windiest month is February with peak winds reaching 26 km/h (16 mph) (gusts up to 60 km/h / 37 mph).
Dunoon averages 1 clear-sky days per month with overall cloud cover around 76%. The clearest skies occur in April.
The annual average dew point in Dunoon is 7°C (45°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Dunoon has a Oceanic climate, classified as Cfb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Dunoon ranges from 4°C (39°F) to 9°C (48°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Dunoon. It earns a climate score of 6.5/10 with Good.
For June in Dunoon, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 17°C (62°F) and 17 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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