Ruhnu weather in August
In August, Ruhnu sees average daytime highs of 19°C and overnight lows near 17°C, with 79 mm of rain across 12 wet days and about 15.1 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.
Highs ease over the month, from about 20°C in the first days to 18°C by the end. The sky is clear or mostly clear about 35% of the time in August, and the air most often feels comfortable.
Daylight stretches from about 16 h 12 min at the start of August to 13 h 48 min by month's end. Set against the rest of the year, August is Ruhnu's 4th-clearest and 8th-windiest month. For the whole year in context, see Ruhnu's year-round climate.
- Daytime high
- 19°
- 1st warmest
- Overnight low
- 17°
- 12th coldest
- Rainfall
- 79 mm
- 12 wet days
- Daylight
- 15 h 06 min
- 4:59 AM – 8:03 PM
- Cloud cover
- 55%
- 4th clearest
- Wind
- 22 km/h
- 8th windiest
- Solar energy
- 4.65 kWh/m²
- Travel score
- 6.0
- out of 10
Temperature in August
Highs ease over the month, from about 20°C in the first days to 18°C by the end.
A typical August day in Ruhnu reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 22°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 20 | 18 |
| 2 | 20 | 18 |
| 3 | 20 | 18 |
| 4 | 20 | 18 |
| 5 | 20 | 18 |
| 6 | 20 | 18 |
| 7 | 20 | 18 |
| 8 | 20 | 18 |
| 9 | 20 | 18 |
| 10 | 20 | 18 |
| 11 | 20 | 18 |
| 12 | 20 | 18 |
| 13 | 20 | 18 |
| 14 | 19 | 17 |
| 15 | 19 | 17 |
| 16 | 19 | 17 |
| 17 | 19 | 17 |
| 18 | 19 | 17 |
| 19 | 19 | 17 |
| 20 | 19 | 17 |
| 21 | 19 | 17 |
| 22 | 19 | 17 |
| 23 | 19 | 17 |
| 24 | 19 | 17 |
| 25 | 18 | 17 |
| 26 | 18 | 16 |
| 27 | 18 | 16 |
| 28 | 18 | 16 |
| 29 | 18 | 16 |
| 30 | 18 | 16 |
| 31 | 18 | 16 |
How August really feels in Ruhnu
Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ruhnu weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 1° / -2° | 45 | 11.9 | 8.4 | 7 | 0.0 |
| Feb | -0° / -3° | 37 | 9.7 | 7 | 8.9 | 0.0 |
| Mar | 1° / -1° | 33 | 8.3 | 4.5 | 11.4 | 0.0 |
| Apr | 5° / 3° | 33 | 7.4 | 1.3 | 14 | 0.2 |
| May | 10° / 8° | 34 | 7.1 | 0 | 16.3 | 2.4 |
| Jun | 15° / 13° | 57 | 9.6 | 0 | 17.7 | 4.8 |
| Jul | 19° / 17° | 60 | 9.2 | 0 | 17.1 | 6.4 |
| Aug | 19° / 17° | 79 | 12 | 0 | 15.1 | 6.0 |
| Sep | 15° / 14° | 66 | 11.7 | 0 | 12.5 | 4.5 |
| Oct | 10° / 9° | 84 | 14.9 | 0.2 | 10 | 2.1 |
| Nov | 6° / 4° | 69 | 14.1 | 2.3 | 7.6 | 0.5 |
| Dec | 3° / 1° | 56 | 13.5 | 6.7 | 6.3 | 0.0 |
Cloud cover in August
The sky is clear or mostly clear about 35% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 63 | 63 | 63 | 63 | 63 | 62 | 62 | 61 | 60 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 54 | 53 | 52 | 52 | 51 | 51 | 51 | 49 | 49 | 48 | 48 | 47 | 47 | 47 | 46 |
| Cloudier (%) | 37 | 37 | 37 | 37 | 37 | 38 | 38 | 39 | 40 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 46 | 47 | 48 | 48 | 49 | 49 | 49 | 51 | 51 | 52 | 52 | 53 | 53 | 53 | 54 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 63 | 37 |
| 2 | 63 | 37 |
| 3 | 63 | 37 |
| 4 | 63 | 37 |
| 5 | 63 | 37 |
| 6 | 62 | 38 |
| 7 | 62 | 38 |
| 8 | 61 | 39 |
| 9 | 60 | 40 |
| 10 | 60 | 40 |
| 11 | 59 | 41 |
| 12 | 58 | 42 |
| 13 | 57 | 43 |
| 14 | 56 | 44 |
| 15 | 55 | 45 |
| 16 | 54 | 46 |
| 17 | 54 | 46 |
| 18 | 53 | 47 |
| 19 | 52 | 48 |
| 20 | 52 | 48 |
| 21 | 51 | 49 |
| 22 | 51 | 49 |
| 23 | 51 | 49 |
| 24 | 49 | 51 |
| 25 | 49 | 51 |
| 26 | 48 | 52 |
| 27 | 48 | 52 |
| 28 | 47 | 53 |
| 29 | 47 | 53 |
| 30 | 47 | 53 |
| 31 | 46 | 54 |
Chance of precipitation in August
Ruhnu gets around 79 mm of rain over 12 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 38% and peaks near 42% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 33 | 33 | 34 | 35 | 35 | 36 | 36 | 37 | 37 | 37 | 37 | 37 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 |
| Rain chance (%) | |
|---|---|
| 1 | 33 |
| 2 | 33 |
| 3 | 34 |
| 4 | 35 |
| 5 | 35 |
| 6 | 36 |
| 7 | 36 |
| 8 | 37 |
| 9 | 37 |
| 10 | 37 |
| 11 | 37 |
| 12 | 37 |
| 13 | 38 |
| 14 | 38 |
| 15 | 38 |
| 16 | 38 |
| 17 | 39 |
| 18 | 39 |
| 19 | 39 |
| 20 | 40 |
| 21 | 40 |
| 22 | 40 |
| 23 | 41 |
| 24 | 41 |
| 25 | 41 |
| 26 | 42 |
| 27 | 42 |
| 28 | 42 |
| 29 | 42 |
| 30 | 42 |
| 31 | 42 |
Humidity in August
Most of August feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the comfortable band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 17 | 18 | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 24 | 25 | 26 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 35 | 36 | 37 | 39 | 40 | 42 | 43 | 45 | 46 |
| Comfortable (%) | 39 | 39 | 40 | 40 | 41 | 41 | 42 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 42 | 42 |
| Humid (%) | 30 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 18 | 17 | 16 | 14 | 13 | 12 | 11 |
| Muggy (%) | 13 | 13 | 12 | 12 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Oppressive (%) | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 17 | 39 | 30 | 13 | 1 |
| 2 | 18 | 39 | 29 | 13 | 1 |
| 3 | 18 | 40 | 29 | 12 | 1 |
| 4 | 19 | 40 | 29 | 12 | 1 |
| 5 | 20 | 41 | 28 | 11 | 1 |
| 6 | 20 | 41 | 28 | 10 | 0 |
| 7 | 21 | 42 | 27 | 10 | 0 |
| 8 | 22 | 43 | 27 | 9 | 0 |
| 9 | 22 | 43 | 26 | 8 | 0 |
| 10 | 23 | 44 | 26 | 8 | 0 |
| 11 | 24 | 44 | 25 | 7 | 0 |
| 12 | 24 | 44 | 25 | 6 | 0 |
| 13 | 25 | 45 | 24 | 6 | 0 |
| 14 | 26 | 45 | 24 | 5 | 0 |
| 15 | 26 | 45 | 23 | 5 | 0 |
| 16 | 27 | 45 | 23 | 4 | 0 |
| 17 | 28 | 45 | 23 | 4 | 0 |
| 18 | 29 | 45 | 22 | 3 | 0 |
| 19 | 30 | 45 | 22 | 3 | 0 |
| 20 | 31 | 45 | 21 | 3 | 0 |
| 21 | 32 | 45 | 21 | 2 | 0 |
| 22 | 33 | 44 | 20 | 2 | 0 |
| 23 | 35 | 44 | 20 | 2 | 0 |
| 24 | 36 | 44 | 19 | 2 | 0 |
| 25 | 37 | 43 | 18 | 1 | 0 |
| 26 | 39 | 43 | 17 | 1 | 0 |
| 27 | 40 | 43 | 16 | 1 | 0 |
| 28 | 42 | 43 | 14 | 1 | 0 |
| 29 | 43 | 43 | 13 | 1 | 0 |
| 30 | 45 | 42 | 12 | 1 | 0 |
| 31 | 46 | 42 | 11 | 1 | 0 |
Wind in August
Winds average 22 km/h in August.
Across August, daily wind ranges from about 20 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 20 | breezy |
| 2 | 20 | breezy |
| 3 | 21 | breezy |
| 4 | 21 | breezy |
| 5 | 21 | breezy |
| 6 | 21 | breezy |
| 7 | 21 | breezy |
| 8 | 21 | breezy |
| 9 | 21 | breezy |
| 10 | 22 | breezy |
| 11 | 22 | breezy |
| 12 | 22 | breezy |
| 13 | 22 | breezy |
| 14 | 22 | breezy |
| 15 | 22 | breezy |
| 16 | 22 | breezy |
| 17 | 22 | breezy |
| 18 | 22 | breezy |
| 19 | 23 | breezy |
| 20 | 23 | breezy |
| 21 | 23 | breezy |
| 22 | 23 | breezy |
| 23 | 23 | breezy |
| 24 | 23 | breezy |
| 25 | 23 | breezy |
| 26 | 23 | breezy |
| 27 | 23 | breezy |
| 28 | 24 | breezy |
| 29 | 24 | breezy |
| 30 | 24 | breezy |
| 31 | 24 | breezy |
Sunrise & sunset in August
Daylight runs from about 16 h 12 min at the start of August to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 144 minutes over August. Sunrise moves from 4:27 AM to 5:32 AM, and sunset from 8:39 PM to 7:22 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 16.2 | 16.1 | 16.1 | 16.0 | 15.9 | 15.8 | 15.8 | 15.7 | 15.6 | 15.5 | 15.5 | 15.4 | 15.3 | 15.2 | 15.2 | 15.1 | 15.0 | 14.9 | 14.8 | 14.8 | 14.7 | 14.6 | 14.5 | 14.4 | 14.3 | 14.3 | 14.2 | 14.1 | 14.0 | 13.9 | 13.8 |
| Sunrise (AM) | 4:27 | 4:29 | 4:31 | 4:33 | 4:35 | 4:37 | 4:39 | 4:42 | 4:44 | 4:46 | 4:48 | 4:50 | 4:52 | 4:54 | 4:57 | 4:59 | 5:01 | 5:03 | 5:05 | 5:08 | 5:10 | 5:12 | 5:14 | 5:16 | 5:19 | 5:21 | 5:23 | 5:25 | 5:27 | 5:29 | 5:32 |
| Sunset (PM) | 8:39 | 8:37 | 8:35 | 8:33 | 8:30 | 8:28 | 8:26 | 8:23 | 8:21 | 8:18 | 8:16 | 8:14 | 8:11 | 8:08 | 8:06 | 8:03 | 8:01 | 7:58 | 7:55 | 7:53 | 7:50 | 7:47 | 7:45 | 7:42 | 7:39 | 7:36 | 7:34 | 7:31 | 7:28 | 7:25 | 7:22 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 16.2 | 4:27 | 8:39 |
| 2 | 16.1 | 4:29 | 8:37 |
| 3 | 16.1 | 4:31 | 8:35 |
| 4 | 16.0 | 4:33 | 8:33 |
| 5 | 15.9 | 4:35 | 8:30 |
| 6 | 15.8 | 4:37 | 8:28 |
| 7 | 15.8 | 4:39 | 8:26 |
| 8 | 15.7 | 4:42 | 8:23 |
| 9 | 15.6 | 4:44 | 8:21 |
| 10 | 15.5 | 4:46 | 8:18 |
| 11 | 15.5 | 4:48 | 8:16 |
| 12 | 15.4 | 4:50 | 8:14 |
| 13 | 15.3 | 4:52 | 8:11 |
| 14 | 15.2 | 4:54 | 8:08 |
| 15 | 15.2 | 4:57 | 8:06 |
| 16 | 15.1 | 4:59 | 8:03 |
| 17 | 15.0 | 5:01 | 8:01 |
| 18 | 14.9 | 5:03 | 7:58 |
| 19 | 14.8 | 5:05 | 7:55 |
| 20 | 14.8 | 5:08 | 7:53 |
| 21 | 14.7 | 5:10 | 7:50 |
| 22 | 14.6 | 5:12 | 7:47 |
| 23 | 14.5 | 5:14 | 7:45 |
| 24 | 14.4 | 5:16 | 7:42 |
| 25 | 14.3 | 5:19 | 7:39 |
| 26 | 14.3 | 5:21 | 7:36 |
| 27 | 14.2 | 5:23 | 7:34 |
| 28 | 14.1 | 5:25 | 7:31 |
| 29 | 14.0 | 5:27 | 7:28 |
| 30 | 13.9 | 5:29 | 7:25 |
| 31 | 13.8 | 5:32 | 7:22 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.65 kWh/m².
For context, solar energy here swings from a low near 0.26 kWh/m² to a high of 6.22 kWh/m² in June across the year — August's 4.65 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.4 | 4.3 | 4.3 | 4.2 | 4.2 | 4.1 | 4.0 | 4.0 | 3.9 | 3.9 | 3.8 | 3.8 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.4 | Bright |
| 2 | 5.4 | Bright |
| 3 | 5.3 | Bright |
| 4 | 5.3 | Bright |
| 5 | 5.2 | Bright |
| 6 | 5.2 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.0 | Bright |
| 10 | 5.0 | Bright |
| 11 | 4.9 | Bright |
| 12 | 4.9 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.7 | Bright |
| 16 | 4.6 | Bright |
| 17 | 4.6 | Bright |
| 18 | 4.5 | Bright |
| 19 | 4.5 | Bright |
| 20 | 4.4 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.2 | Bright |
| 24 | 4.2 | Bright |
| 25 | 4.1 | Bright |
| 26 | 4.0 | Bright |
| 27 | 4.0 | Moderate |
| 28 | 3.9 | Moderate |
| 29 | 3.9 | Moderate |
| 30 | 3.8 | Moderate |
| 31 | 3.8 | Moderate |
Is August a good time to visit Ruhnu?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Ruhnu for sightseeing.
What to pack for Ruhnu in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Ruhnu sees daytime highs around 19°C and nights near 17°C. Worth packing: rain gear, sun protection and a windbreaker. About 12 days see rain.
Sea temperature near Ruhnu in August
The nearest coast averages about 18°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 18°C and coldest in February near 1°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 2 | 1 | 1 | 3 | 7 | 13 | 17 | 18 | 15 | 11 | 8 | 5 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 2 | Bracing |
| Feb | 1 | Bracing |
| Mar | 1 | Bracing |
| Apr | 3 | Bracing |
| May | 7 | Bracing |
| Jun | 13 | Bracing |
| Jul | 17 | Cool |
| Aug | 18 | Cool |
| Sep | 15 | Cool |
| Oct | 11 | Bracing |
| Nov | 8 | Bracing |
| Dec | 5 | Bracing |
UV index in Ruhnu in August
Clear-sky midday UV in August peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ruhnu peaks around June 19 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 2 | 3 | 4 | 6 | 5 | 5 | 3 | 1 | 1 | 0 |
| Level | Low | Low | Low | Moderate | Moderate | High | Moderate | Moderate | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 2 | Low |
| Apr | 3 | Moderate |
| May | 4 | Moderate |
| Jun | 6 | High |
| Jul | 5 | Moderate |
| Aug | 5 | Moderate |
| Sep | 3 | Moderate |
| Oct | 1 | Low |
| Nov | 1 | Low |
| Dec | 0 | Low |
Where is Ruhnu?
Ruhnu sits at 57.8°N, 23.2°E, 0 m above sea level, in Estonia. The nearest listed city is Kuressaare, 67 km away.
Topography around Ruhnu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ruhnu.
Within 3 km, the terrain around Ruhnu has only modest variations in elevation — a maximum elevation change of 38 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 38 m; within 80 km, only modest variations in elevation — a maximum elevation change of 184 m.
The land around Ruhnu is covered by water (63%) and trees (23%) within 3 km, water (99%) within 16 km, and water (70%) and trees (21%) within 80 km.
Estonia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 66% of US
- price level, 2025
- GDP per capita
- $34,418
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 1.5
- per 100k, 2023
- Road deaths
- 4.5
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 561
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ruhnu (57.8003°, 23.2483°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).