Osny weather in August
In August, Osny sees average daytime highs of 24°C and overnight lows near 14°C, with 58 mm of rain across 9.2 wet days and about 14.2 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.
Highs ease over the month, from about 25°C in the first days to 22°C by the end. The sky is clear or mostly clear about 22% of the time in August, and the air most often feels dry.
Daylight stretches from about 15 hours at the start of August to 13 h 18 min by month's end. Set against the rest of the year, August is Osny's 1st-clearest and 12th-windiest month. For the whole year in context, see Osny's year-round climate.
- Daytime high
- 24°
- 1st warmest
- Overnight low
- 14°
- 11th coldest
- Rainfall
- 58 mm
- 9.2 wet days
- Daylight
- 14 h 12 min
- 5:50 AM – 8:02 PM
- Cloud cover
- 62%
- 1st clearest
- Wind
- 11 km/h
- 12th windiest
- Solar energy
- 4.73 kWh/m²
- Travel score
- 7.0
- out of 10
Temperature in August
Highs ease over the month, from about 25°C in the first days to 22°C by the end.
A typical August day in Osny reaches about 24°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°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) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 |
| Avg low (°C) | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 15 |
| 2 | 25 | 15 |
| 3 | 25 | 15 |
| 4 | 25 | 15 |
| 5 | 25 | 15 |
| 6 | 25 | 15 |
| 7 | 25 | 14 |
| 8 | 25 | 14 |
| 9 | 25 | 14 |
| 10 | 24 | 14 |
| 11 | 24 | 14 |
| 12 | 24 | 14 |
| 13 | 24 | 14 |
| 14 | 24 | 14 |
| 15 | 24 | 14 |
| 16 | 24 | 14 |
| 17 | 24 | 14 |
| 18 | 24 | 14 |
| 19 | 24 | 14 |
| 20 | 24 | 14 |
| 21 | 24 | 14 |
| 22 | 23 | 14 |
| 23 | 23 | 14 |
| 24 | 23 | 13 |
| 25 | 23 | 13 |
| 26 | 23 | 13 |
| 27 | 23 | 13 |
| 28 | 23 | 13 |
| 29 | 22 | 13 |
| 30 | 22 | 13 |
| 31 | 22 | 13 |
How August really feels in Osny
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.
Osny weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 7° / 2° | 55 | 11.3 | 0.9 | 8.5 | 0.8 |
| Feb | 8° / 2° | 48 | 9.8 | 1.2 | 9.8 | 1.2 |
| Mar | 12° / 4° | 52 | 10.5 | 0.5 | 11.6 | 2.9 |
| Apr | 15° / 6° | 51 | 11 | 0.1 | 13.4 | 4.3 |
| May | 18° / 9° | 64 | 11.3 | 0 | 15 | 5.5 |
| Jun | 21° / 12° | 57 | 10.1 | 0 | 15.9 | 6.4 |
| Jul | 24° / 14° | 51 | 9.1 | 0 | 15.6 | 7.0 |
| Aug | 24° / 14° | 58 | 9.2 | 0 | 14.2 | 7.0 |
| Sep | 20° / 11° | 44 | 8.5 | 0 | 12.4 | 6.4 |
| Oct | 16° / 9° | 62 | 11.2 | 0 | 10.5 | 4.5 |
| Nov | 10° / 5° | 60 | 11.4 | 0.2 | 8.9 | 2.2 |
| Dec | 7° / 3° | 70 | 12.6 | 0.9 | 8.1 | 0.9 |
Cloud cover in August
The sky is clear or mostly clear about 22% of the time in August, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 58%.
| 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 (%) | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 |
| Cloudier (%) | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 62 | 62 | 62 | 62 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 45 | 55 |
| 2 | 45 | 55 |
| 3 | 45 | 55 |
| 4 | 45 | 55 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 45 | 55 |
| 8 | 43 | 57 |
| 9 | 43 | 57 |
| 10 | 43 | 57 |
| 11 | 43 | 57 |
| 12 | 43 | 57 |
| 13 | 43 | 57 |
| 14 | 43 | 57 |
| 15 | 41 | 59 |
| 16 | 41 | 59 |
| 17 | 41 | 59 |
| 18 | 41 | 59 |
| 19 | 40 | 60 |
| 20 | 40 | 60 |
| 21 | 40 | 60 |
| 22 | 40 | 60 |
| 23 | 40 | 60 |
| 24 | 39 | 61 |
| 25 | 39 | 61 |
| 26 | 39 | 61 |
| 27 | 39 | 61 |
| 28 | 38 | 62 |
| 29 | 38 | 62 |
| 30 | 38 | 62 |
| 31 | 38 | 62 |
Chance of precipitation in August
Osny gets around 58 mm of rain over 9.2 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 29% and peaks near 31% on the wettest days.
| 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 (%) | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 27 | 27 |
| Rain chance (%) | |
|---|---|
| 1 | 30 |
| 2 | 30 |
| 3 | 31 |
| 4 | 31 |
| 5 | 31 |
| 6 | 31 |
| 7 | 31 |
| 8 | 31 |
| 9 | 31 |
| 10 | 31 |
| 11 | 31 |
| 12 | 30 |
| 13 | 30 |
| 14 | 30 |
| 15 | 30 |
| 16 | 29 |
| 17 | 29 |
| 18 | 29 |
| 19 | 29 |
| 20 | 29 |
| 21 | 29 |
| 22 | 29 |
| 23 | 29 |
| 24 | 29 |
| 25 | 28 |
| 26 | 28 |
| 27 | 28 |
| 28 | 28 |
| 29 | 27 |
| 30 | 27 |
| 31 | 27 |
Humidity in August
Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the dry band about 44% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 36 | 36 | 36 | 37 | 38 | 38 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 43 | 43 | 44 | 45 | 47 | 48 | 50 | 52 | 53 | 54 | 55 | 56 | 57 |
| Comfortable (%) | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 37 | 36 | 35 | 34 | 33 | 32 | 31 | 31 | 30 | 30 | 29 |
| Humid (%) | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 13 |
| Muggy (%) | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 36 | 42 | 19 | 2 |
| 2 | 36 | 42 | 19 | 2 |
| 3 | 36 | 42 | 19 | 2 |
| 4 | 37 | 42 | 19 | 2 |
| 5 | 38 | 41 | 19 | 3 |
| 6 | 38 | 41 | 18 | 3 |
| 7 | 39 | 41 | 18 | 3 |
| 8 | 39 | 40 | 18 | 3 |
| 9 | 40 | 40 | 18 | 3 |
| 10 | 40 | 40 | 18 | 3 |
| 11 | 40 | 39 | 18 | 3 |
| 12 | 41 | 39 | 18 | 2 |
| 13 | 41 | 39 | 18 | 2 |
| 14 | 41 | 39 | 17 | 2 |
| 15 | 41 | 39 | 17 | 2 |
| 16 | 42 | 39 | 17 | 2 |
| 17 | 42 | 39 | 17 | 2 |
| 18 | 42 | 38 | 17 | 2 |
| 19 | 43 | 38 | 17 | 2 |
| 20 | 43 | 38 | 17 | 2 |
| 21 | 44 | 37 | 17 | 2 |
| 22 | 45 | 36 | 17 | 1 |
| 23 | 47 | 35 | 17 | 1 |
| 24 | 48 | 34 | 16 | 1 |
| 25 | 50 | 33 | 16 | 1 |
| 26 | 52 | 32 | 15 | 1 |
| 27 | 53 | 31 | 15 | 1 |
| 28 | 54 | 31 | 14 | 1 |
| 29 | 55 | 30 | 14 | 1 |
| 30 | 56 | 30 | 13 | 1 |
| 31 | 57 | 29 | 13 | 1 |
Wind in August
Winds average 11 km/h in August, the calmest month.
Across August, daily wind ranges from about 11 km/h on the calmest days to 11 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) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| 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 | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in August
Daylight runs from about 15 hours at the start of August to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 102 minutes over August. Sunrise moves from 5:29 AM to 6:12 AM, and sunset from 8:27 PM to 7:32 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) | 15.0 | 14.9 | 14.9 | 14.8 | 14.8 | 14.7 | 14.7 | 14.6 | 14.6 | 14.5 | 14.5 | 14.4 | 14.4 | 14.3 | 14.3 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.3 |
| Sunrise (AM) | 5:29 | 5:30 | 5:31 | 5:33 | 5:34 | 5:35 | 5:37 | 5:38 | 5:40 | 5:41 | 5:42 | 5:44 | 5:45 | 5:47 | 5:48 | 5:50 | 5:51 | 5:53 | 5:54 | 5:56 | 5:57 | 5:58 | 6:00 | 6:01 | 6:03 | 6:04 | 6:06 | 6:07 | 6:09 | 6:10 | 6:12 |
| Sunset (PM) | 8:27 | 8:26 | 8:24 | 8:23 | 8:21 | 8:19 | 8:18 | 8:16 | 8:14 | 8:13 | 8:11 | 8:09 | 8:07 | 8:06 | 8:04 | 8:02 | 8:00 | 7:58 | 7:56 | 7:54 | 7:52 | 7:50 | 7:48 | 7:46 | 7:44 | 7:42 | 7:40 | 7:38 | 7:36 | 7:34 | 7:32 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 15.0 | 5:29 | 8:27 |
| 2 | 14.9 | 5:30 | 8:26 |
| 3 | 14.9 | 5:31 | 8:24 |
| 4 | 14.8 | 5:33 | 8:23 |
| 5 | 14.8 | 5:34 | 8:21 |
| 6 | 14.7 | 5:35 | 8:19 |
| 7 | 14.7 | 5:37 | 8:18 |
| 8 | 14.6 | 5:38 | 8:16 |
| 9 | 14.6 | 5:40 | 8:14 |
| 10 | 14.5 | 5:41 | 8:13 |
| 11 | 14.5 | 5:42 | 8:11 |
| 12 | 14.4 | 5:44 | 8:09 |
| 13 | 14.4 | 5:45 | 8:07 |
| 14 | 14.3 | 5:47 | 8:06 |
| 15 | 14.3 | 5:48 | 8:04 |
| 16 | 14.2 | 5:50 | 8:02 |
| 17 | 14.1 | 5:51 | 8:00 |
| 18 | 14.1 | 5:53 | 7:58 |
| 19 | 14.0 | 5:54 | 7:56 |
| 20 | 14.0 | 5:56 | 7:54 |
| 21 | 13.9 | 5:57 | 7:52 |
| 22 | 13.9 | 5:58 | 7:50 |
| 23 | 13.8 | 6:00 | 7:48 |
| 24 | 13.7 | 6:01 | 7:46 |
| 25 | 13.7 | 6:03 | 7:44 |
| 26 | 13.6 | 6:04 | 7:42 |
| 27 | 13.6 | 6:06 | 7:40 |
| 28 | 13.5 | 6:07 | 7:38 |
| 29 | 13.5 | 6:09 | 7:36 |
| 30 | 13.4 | 6:10 | 7:34 |
| 31 | 13.3 | 6:12 | 7:32 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.73 kWh/m².
For context, solar energy here swings from a low near 0.77 kWh/m² to a high of 5.55 kWh/m² in June across the year — August's 4.73 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) | 5.2 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.5 | 4.5 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.1 | 4.1 |
| 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 | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.2 | Bright |
| 2 | 5.2 | Bright |
| 3 | 5.2 | Bright |
| 4 | 5.2 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.0 | Bright |
| 8 | 5.0 | 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 | 4.8 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.7 | Bright |
| 18 | 4.7 | Bright |
| 19 | 4.6 | Bright |
| 20 | 4.6 | Bright |
| 21 | 4.5 | Bright |
| 22 | 4.5 | Bright |
| 23 | 4.4 | Bright |
| 24 | 4.4 | Bright |
| 25 | 4.3 | Bright |
| 26 | 4.3 | Bright |
| 27 | 4.3 | Bright |
| 28 | 4.2 | Bright |
| 29 | 4.2 | Bright |
| 30 | 4.1 | Bright |
| 31 | 4.1 | Bright |
Is August a good time to visit Osny?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is one of the better times to visit Osny for general sightseeing.
What to pack for Osny in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Osny sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.
UV index in Osny in August
Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Osny peaks around June 20 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 5 | 6 | 7 | 7 | 7 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 5 | Moderate |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 7 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Osny in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Osny is worst in April — around 20 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 17 | 20 | 20 | 17 | 16 | 13 | 14 | 15 | 15 | 15 | 15 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 17 | Moderate |
| Mar | 20 | Moderate |
| Apr | 20 | Moderate |
| May | 17 | Moderate |
| Jun | 16 | Moderate |
| Jul | 13 | Moderate |
| Aug | 14 | Moderate |
| Sep | 15 | Moderate |
| Oct | 15 | Moderate |
| Nov | 15 | Moderate |
| Dec | 15 | Moderate |
Where is Osny?
Osny sits at 49.1°N, 2.1°E, 91 m above sea level, in France. The nearest listed city is Pontoise, 4.0 km away.
Topography around Osny
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Osny.
Within 3 km, the terrain around Osny has only modest variations in elevation — a maximum elevation change of 83 m around an average of 79 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 217 m; within 80 km, significant variations in elevation — a maximum elevation change of 263 m.
The land around Osny is covered by cropland (33%), trees (32%) and artificial surfaces (25%) within 3 km, trees (39%) and cropland (37%) within 16 km, and cropland (51%) and trees (32%) within 80 km.
France travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 77% of US
- price level, 2025
- GDP per capita
- $48,986
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.3
- per 100k, 2023
- Road deaths
- 5.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 539
- 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 Osny (49.0701°, 2.0628°, elevation 91 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. 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).