Rethymno weather in September
In September, Rethymno sees average daytime highs of 26°C and overnight lows near 20°C, with 17 mm of rain across 2.8 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.
Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 83% of the time in September, and the air most often feels comfortable.
Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Rethymno's 4th-clearest and 8th-windiest month. For the whole year in context, see Rethymno's year-round climate.
- Daytime high
- 26°
- 3rd warmest
- Overnight low
- 20°
- 10th coldest
- Rainfall
- 17 mm
- 2.8 wet days
- Daylight
- 12 h 12 min
- 6:10 AM – 6:23 PM
- Cloud cover
- 18%
- 4th clearest
- Wind
- 8 km/h
- 8th windiest
- Solar energy
- 5.66 kWh/m²
- Travel score
- 8.7
- out of 10
Rethymno is city in Crete, Greece.
- Density
- 82/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 27°C in the first days to 24°C by the end.
A typical September day in Rethymno reaches about 26°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 21 |
| 2 | 27 | 21 |
| 3 | 27 | 21 |
| 4 | 27 | 21 |
| 5 | 27 | 21 |
| 6 | 26 | 21 |
| 7 | 26 | 21 |
| 8 | 26 | 20 |
| 9 | 26 | 20 |
| 10 | 26 | 20 |
| 11 | 26 | 20 |
| 12 | 26 | 20 |
| 13 | 26 | 20 |
| 14 | 26 | 20 |
| 15 | 26 | 20 |
| 16 | 26 | 20 |
| 17 | 26 | 20 |
| 18 | 25 | 20 |
| 19 | 25 | 19 |
| 20 | 25 | 19 |
| 21 | 25 | 19 |
| 22 | 25 | 19 |
| 23 | 25 | 19 |
| 24 | 25 | 19 |
| 25 | 25 | 19 |
| 26 | 25 | 19 |
| 27 | 25 | 19 |
| 28 | 24 | 18 |
| 29 | 24 | 18 |
| 30 | 24 | 18 |
Rethymno weather by month
How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 13° / 8° | 97 | 14.1 | 0.5 | 9.9 | 3.2 |
| Feb | 13° / 8° | 87 | 12.3 | 0.6 | 10.7 | 3.3 |
| Mar | 14° / 9° | 62 | 9.5 | 0.2 | 11.7 | 4.4 |
| Apr | 17° / 12° | 34 | 6 | 0 | 12.9 | 6.5 |
| May | 22° / 15° | 23 | 3.7 | 0 | 13.8 | 8.2 |
| Jun | 26° / 19° | 6 | 1.3 | 0 | 14.3 | 9.1 |
| Jul | 27° / 22° | 3 | 0.6 | 0 | 14.1 | 9.0 |
| Aug | 28° / 22° | 3 | 0.7 | 0 | 13.3 | 8.9 |
| Sep | 26° / 20° | 17 | 2.8 | 0 | 12.2 | 8.7 |
| Oct | 22° / 16° | 48 | 6.4 | 0 | 11.1 | 7.6 |
| Nov | 18° / 13° | 69 | 9.6 | 0 | 10.1 | 5.8 |
| Dec | 14° / 10° | 101 | 13.7 | 0.1 | 9.7 | 3.8 |
Cloud cover in September
The sky is clear or mostly clear about 83% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 7%. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 99 | 98 | 98 | 98 | 97 | 97 | 97 | 97 | 96 | 96 | 96 | 95 | 95 | 94 | 94 | 94 | 93 | 92 | 92 | 91 | 91 | 91 | 89 | 89 | 88 | 88 | 86 | 86 | 85 | 85 |
| Cloudier (%) | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 6 | 7 | 8 | 8 | 9 | 9 | 9 | 11 | 11 | 12 | 12 | 14 | 14 | 15 | 15 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 99 | 1 |
| 2 | 98 | 2 |
| 3 | 98 | 2 |
| 4 | 98 | 2 |
| 5 | 97 | 3 |
| 6 | 97 | 3 |
| 7 | 97 | 3 |
| 8 | 97 | 3 |
| 9 | 96 | 4 |
| 10 | 96 | 4 |
| 11 | 96 | 4 |
| 12 | 95 | 5 |
| 13 | 95 | 5 |
| 14 | 94 | 6 |
| 15 | 94 | 6 |
| 16 | 94 | 6 |
| 17 | 93 | 7 |
| 18 | 92 | 8 |
| 19 | 92 | 8 |
| 20 | 91 | 9 |
| 21 | 91 | 9 |
| 22 | 91 | 9 |
| 23 | 89 | 11 |
| 24 | 89 | 11 |
| 25 | 88 | 12 |
| 26 | 88 | 12 |
| 27 | 86 | 14 |
| 28 | 86 | 14 |
| 29 | 85 | 15 |
| 30 | 85 | 15 |
Chance of precipitation in September
Rethymno gets around 17 mm of rain over 2.8 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 9% and peaks near 14% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 14 |
| Rain chance (%) | |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 4 |
| 4 | 4 |
| 5 | 5 |
| 6 | 5 |
| 7 | 5 |
| 8 | 6 |
| 9 | 6 |
| 10 | 6 |
| 11 | 7 |
| 12 | 7 |
| 13 | 8 |
| 14 | 8 |
| 15 | 9 |
| 16 | 9 |
| 17 | 10 |
| 18 | 10 |
| 19 | 11 |
| 20 | 11 |
| 21 | 12 |
| 22 | 12 |
| 23 | 12 |
| 24 | 13 |
| 25 | 13 |
| 26 | 13 |
| 27 | 13 |
| 28 | 13 |
| 29 | 13 |
| 30 | 14 |
Humidity in September
Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the comfortable band about 42% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 12 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 19 | 20 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 26 | 26 | 27 |
| Comfortable (%) | 40 | 40 | 40 | 40 | 41 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 46 | 46 |
| Humid (%) | 46 | 46 | 45 | 44 | 44 | 43 | 43 | 42 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 37 | 36 | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 29 | 28 | 27 |
| Muggy (%) | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 7 | 40 | 46 | 7 |
| 2 | 8 | 40 | 46 | 7 |
| 3 | 8 | 40 | 45 | 6 |
| 4 | 9 | 40 | 44 | 6 |
| 5 | 10 | 41 | 44 | 6 |
| 6 | 11 | 41 | 43 | 5 |
| 7 | 12 | 41 | 43 | 5 |
| 8 | 12 | 41 | 42 | 4 |
| 9 | 13 | 41 | 41 | 4 |
| 10 | 14 | 42 | 41 | 4 |
| 11 | 14 | 42 | 40 | 4 |
| 12 | 15 | 42 | 40 | 3 |
| 13 | 15 | 42 | 40 | 3 |
| 14 | 16 | 42 | 39 | 3 |
| 15 | 17 | 42 | 39 | 3 |
| 16 | 17 | 42 | 39 | 2 |
| 17 | 18 | 42 | 38 | 2 |
| 18 | 19 | 42 | 38 | 2 |
| 19 | 19 | 42 | 37 | 2 |
| 20 | 20 | 42 | 36 | 2 |
| 21 | 20 | 43 | 36 | 1 |
| 22 | 21 | 43 | 35 | 1 |
| 23 | 22 | 43 | 34 | 1 |
| 24 | 23 | 44 | 33 | 1 |
| 25 | 23 | 44 | 32 | 1 |
| 26 | 24 | 44 | 31 | 1 |
| 27 | 25 | 45 | 30 | 0 |
| 28 | 26 | 45 | 29 | 0 |
| 29 | 26 | 46 | 28 | 0 |
| 30 | 27 | 46 | 27 | 0 |
Wind in September
Winds average 8 km/h in September.
Across September, daily wind ranges from about 7 km/h on the calmest days to 9 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over September. Sunrise moves from 5:58 AM to 6:21 AM, and sunset from 6:45 PM to 6:02 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 | 11.7 | 11.7 |
| Sunrise (AM) | 5:58 | 5:59 | 6:00 | 6:01 | 6:01 | 6:02 | 6:03 | 6:04 | 6:04 | 6:05 | 6:06 | 6:07 | 6:08 | 6:08 | 6:09 | 6:10 | 6:11 | 6:11 | 6:12 | 6:13 | 6:14 | 6:14 | 6:15 | 6:16 | 6:17 | 6:18 | 6:18 | 6:19 | 6:20 | 6:21 |
| Sunset (PM) | 6:45 | 6:44 | 6:42 | 6:41 | 6:39 | 6:38 | 6:36 | 6:35 | 6:34 | 6:32 | 6:31 | 6:29 | 6:28 | 6:26 | 6:24 | 6:23 | 6:21 | 6:20 | 6:18 | 6:17 | 6:15 | 6:14 | 6:12 | 6:11 | 6:09 | 6:08 | 6:06 | 6:05 | 6:03 | 6:02 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.8 | 5:58 | 6:45 |
| 2 | 12.7 | 5:59 | 6:44 |
| 3 | 12.7 | 6:00 | 6:42 |
| 4 | 12.7 | 6:01 | 6:41 |
| 5 | 12.6 | 6:01 | 6:39 |
| 6 | 12.6 | 6:02 | 6:38 |
| 7 | 12.6 | 6:03 | 6:36 |
| 8 | 12.5 | 6:04 | 6:35 |
| 9 | 12.5 | 6:04 | 6:34 |
| 10 | 12.4 | 6:05 | 6:32 |
| 11 | 12.4 | 6:06 | 6:31 |
| 12 | 12.4 | 6:07 | 6:29 |
| 13 | 12.3 | 6:08 | 6:28 |
| 14 | 12.3 | 6:08 | 6:26 |
| 15 | 12.3 | 6:09 | 6:24 |
| 16 | 12.2 | 6:10 | 6:23 |
| 17 | 12.2 | 6:11 | 6:21 |
| 18 | 12.1 | 6:11 | 6:20 |
| 19 | 12.1 | 6:12 | 6:18 |
| 20 | 12.1 | 6:13 | 6:17 |
| 21 | 12.0 | 6:14 | 6:15 |
| 22 | 12.0 | 6:14 | 6:14 |
| 23 | 12.0 | 6:15 | 6:12 |
| 24 | 11.9 | 6:16 | 6:11 |
| 25 | 11.9 | 6:17 | 6:09 |
| 26 | 11.8 | 6:18 | 6:08 |
| 27 | 11.8 | 6:18 | 6:06 |
| 28 | 11.8 | 6:19 | 6:05 |
| 29 | 11.7 | 6:20 | 6:03 |
| 30 | 11.7 | 6:21 | 6:02 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.66 kWh/m².
For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 7.92 kWh/m² in June across the year — September's 5.66 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.4 | 6.4 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.4 | Intense |
| 2 | 6.4 | Intense |
| 3 | 6.3 | Intense |
| 4 | 6.3 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.1 | Intense |
| 8 | 6.1 | Intense |
| 9 | 6.0 | Intense |
| 10 | 6.0 | Bright |
| 11 | 5.9 | Bright |
| 12 | 5.9 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.8 | Bright |
| 15 | 5.7 | Bright |
| 16 | 5.7 | Bright |
| 17 | 5.6 | Bright |
| 18 | 5.5 | Bright |
| 19 | 5.5 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.3 | Bright |
| 23 | 5.3 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.2 | Bright |
| 26 | 5.1 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
Hazard calendar for Rethymno
None of Rethymno's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Rethymno's rainy season runs October–March, when most of the year's rain falls.
Rethymno sees seasonal dust haze (May), heaviest in May.
Is September a good time to visit Rethymno?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Rethymno for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Rethymno in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Rethymno sees daytime highs around 26°C and nights near 20°C. Worth packing: light clothes and sun protection.
Sea temperature near Rethymno in September
The nearest coast averages about 25°C in September — 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 26°C and coldest in February near 16°C.
It's comfortable for a long swim from May 25 to Nov 24 — about 6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 16 | 16 | 17 | 19 | 22 | 25 | 26 | 25 | 23 | 21 | 18 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Warm | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 16 | Cool |
| Mar | 16 | Cool |
| Apr | 17 | Cool |
| May | 19 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 18 | Cool |
UV index in Rethymno in September
Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rethymno peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 3 | 6 | 8 | 8 | 10 | 10 | 10 | 8 | 6 | 3 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 3 | Moderate |
| Mar | 6 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 3 | Moderate |
Air quality in Rethymno in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Rethymno is worst in April — around 15 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (September, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 14 | 14 | 15 | 12 | 9 | 9 | 10 | 8 | 8 | 11 | 8 |
| Level | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 14 | Moderate |
| Apr | 15 | Moderate |
| May | 12 | Good |
| Jun | 9 | Good |
| Jul | 9 | Good |
| Aug | 10 | Good |
| Sep | 8 | Good |
| Oct | 8 | Good |
| Nov | 11 | Good |
| Dec | 8 | Good |
Where is Rethymno?
Rethymno sits at 35.4°N, 24.5°E, 14 m above sea level, in Greece. The nearest listed city is Chania, 44 km away.
Topography around Rethymno
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rethymno.
Within 3 km, the terrain around Rethymno has significant variations in elevation — a maximum elevation change of 329 m around an average of 64 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 842 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,432 m.
The land around Rethymno is covered by water (44%) and trees (29%) within 3 km, water (47%), trees (25%) and grassland (21%) within 16 km, and water (66%) within 80 km.
Greece travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $26,948
- 2025
- Happiness
- 5.7 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.8
- per 100k, 2023
- Road deaths
- 8.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 592
- 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 Rethymno (35.3655°, 24.4823°, elevation 14 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).