Biel/Bienne weather in December
In December, Biel/Bienne sees average daytime highs of 4°C and overnight lows near -1°C, with 106 mm of precipitation across 14.5 wet days and about 8.4 hours of daylight. It is the 11th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 4°C through the month. The sky is clear or mostly clear about 17% of the time in December, and the air most often feels dry.
Daylight stretches from about 8 h 36 min at the start of December to 8 h 18 min by month's end. Set against the rest of the year, December is Biel/Bienne's 11th-clearest and 3rd-windiest month. For the whole year in context, see Biel/Bienne's year-round climate.
- Daytime high
- 4°
- 11th warmest
- Overnight low
- -1°
- 3rd coldest
- Precipitation
- 106 mm
- 14.5 wet days
- Daylight
- 8 h 18 min
- 8:18 AM – 4:36 PM
- Cloud cover
- 72%
- 11th clearest
- Wind
- 8 km/h
- 3rd windiest
- Solar energy
- 1.02 kWh/m²
- Travel score
- 0.0
- out of 10
Biel/Bienne is Settlement within the Swiss municipality of the same name.
- Air quality
- Good
- PM2.5 9.1 µg/m³ · 2020
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 4°C through the month.
A typical December day in Biel/Bienne reaches about 4°C in the afternoon and slips back to -1°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between -1°C and 9°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.
| 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) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Avg low (°C) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 | -1 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 5 | 0 |
| 2 | 5 | 0 |
| 3 | 5 | 0 |
| 4 | 5 | 0 |
| 5 | 5 | 0 |
| 6 | 5 | 0 |
| 7 | 5 | 0 |
| 8 | 5 | 0 |
| 9 | 4 | 0 |
| 10 | 4 | 0 |
| 11 | 4 | -1 |
| 12 | 4 | -1 |
| 13 | 4 | -1 |
| 14 | 4 | -1 |
| 15 | 4 | -1 |
| 16 | 4 | -1 |
| 17 | 4 | -1 |
| 18 | 4 | -1 |
| 19 | 4 | -1 |
| 20 | 4 | -1 |
| 21 | 4 | -1 |
| 22 | 4 | -1 |
| 23 | 4 | -1 |
| 24 | 4 | -1 |
| 25 | 4 | -1 |
| 26 | 4 | -1 |
| 27 | 4 | -1 |
| 28 | 4 | -1 |
| 29 | 4 | -1 |
| 30 | 4 | -1 |
| 31 | 4 | -1 |
How December really feels in Biel/Bienne
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is cold — wind chill drags the overnight "feels like" below the raw low.
Biel/Bienne weather by month
How December compares with the rest of the year at a glance. December is the 11th-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 4° / -2° | 87 | 13.3 | 6.9 | 8.7 | 0.0 |
| Feb | 5° / -2° | 78 | 12 | 6.7 | 10 | 0.2 |
| Mar | 10° / 1° | 93 | 14 | 4.8 | 11.6 | 1.9 |
| Apr | 14° / 4° | 105 | 15.3 | 2.3 | 13.3 | 3.4 |
| May | 18° / 8° | 151 | 17.8 | 0.2 | 14.8 | 4.6 |
| Jun | 21° / 12° | 146 | 17.5 | 0 | 15.6 | 5.3 |
| Jul | 23° / 14° | 153 | 16.5 | 0 | 15.3 | 5.9 |
| Aug | 23° / 13° | 157 | 15.9 | 0 | 14 | 5.9 |
| Sep | 18° / 10° | 114 | 13.9 | 0 | 12.4 | 5.3 |
| Oct | 13° / 6° | 109 | 13.6 | 0.5 | 10.6 | 3.5 |
| Nov | 8° / 2° | 101 | 13.3 | 3.5 | 9.1 | 1.0 |
| Dec | 4° / -1° | 106 | 14.5 | 6.6 | 8.4 | 0.0 |
Cloud cover in December
The sky is clear or mostly clear about 17% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 71%.
| 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 (%) | 27 | 27 | 27 | 28 | 29 | 28 | 29 | 30 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 29 |
| Cloudier (%) | 73 | 73 | 73 | 72 | 71 | 72 | 71 | 70 | 69 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 72 | 72 | 71 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 27 | 73 |
| 2 | 27 | 73 |
| 3 | 27 | 73 |
| 4 | 28 | 72 |
| 5 | 29 | 71 |
| 6 | 28 | 72 |
| 7 | 29 | 71 |
| 8 | 30 | 70 |
| 9 | 31 | 69 |
| 10 | 30 | 70 |
| 11 | 30 | 70 |
| 12 | 30 | 70 |
| 13 | 30 | 70 |
| 14 | 30 | 70 |
| 15 | 30 | 70 |
| 16 | 30 | 70 |
| 17 | 29 | 71 |
| 18 | 29 | 71 |
| 19 | 29 | 71 |
| 20 | 29 | 71 |
| 21 | 29 | 71 |
| 22 | 29 | 71 |
| 23 | 29 | 71 |
| 24 | 29 | 71 |
| 25 | 28 | 72 |
| 26 | 28 | 72 |
| 27 | 28 | 72 |
| 28 | 28 | 72 |
| 29 | 28 | 72 |
| 30 | 28 | 72 |
| 31 | 29 | 71 |
Chance of precipitation in December
Biel/Bienne gets around 106 mm of rain and snow over 14.5 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 47% and peaks near 48% on the wettest days, and about 7 days bring snow.
| 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 (%) | 44 | 45 | 45 | 46 | 46 | 46 | 47 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 46 | 46 | 46 |
| Snow chance (%) | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 44 | 19 |
| 2 | 45 | 19 |
| 3 | 45 | 20 |
| 4 | 46 | 20 |
| 5 | 46 | 20 |
| 6 | 46 | 20 |
| 7 | 47 | 20 |
| 8 | 47 | 20 |
| 9 | 47 | 21 |
| 10 | 47 | 21 |
| 11 | 47 | 21 |
| 12 | 48 | 21 |
| 13 | 48 | 21 |
| 14 | 48 | 21 |
| 15 | 48 | 21 |
| 16 | 48 | 21 |
| 17 | 48 | 21 |
| 18 | 48 | 21 |
| 19 | 48 | 21 |
| 20 | 48 | 21 |
| 21 | 48 | 22 |
| 22 | 47 | 22 |
| 23 | 47 | 22 |
| 24 | 47 | 22 |
| 25 | 47 | 22 |
| 26 | 47 | 22 |
| 27 | 47 | 22 |
| 28 | 47 | 22 |
| 29 | 46 | 22 |
| 30 | 46 | 21 |
| 31 | 46 | 21 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 100% 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 (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in December
Winds average 8 km/h in December.
Across December, daily wind ranges from about 7 km/h on the calmest days to 8 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) | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| 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 | 7 | calm |
| 2 | 7 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | 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 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in December
Daylight runs from about 8 h 36 min at the start of December to 8 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over December. Sunrise moves from 8:04 AM to 8:24 AM, and sunset from 4:38 PM to 4:44 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) | 8.6 | 8.5 | 8.5 | 8.5 | 8.5 | 8.5 | 8.4 | 8.4 | 8.4 | 8.4 | 8.4 | 8.4 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 |
| Sunrise (AM) | 8:04 | 8:05 | 8:06 | 8:07 | 8:08 | 8:09 | 8:10 | 8:11 | 8:12 | 8:13 | 8:14 | 8:15 | 8:16 | 8:16 | 8:17 | 8:18 | 8:19 | 8:19 | 8:20 | 8:20 | 8:21 | 8:21 | 8:22 | 8:22 | 8:23 | 8:23 | 8:23 | 8:23 | 8:24 | 8:24 | 8:24 |
| Sunset (PM) | 4:38 | 4:38 | 4:37 | 4:37 | 4:37 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:36 | 4:37 | 4:37 | 4:37 | 4:38 | 4:38 | 4:39 | 4:39 | 4:40 | 4:40 | 4:41 | 4:41 | 4:42 | 4:43 | 4:44 | 4:44 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 8.6 | 8:04 | 4:38 |
| 2 | 8.5 | 8:05 | 4:38 |
| 3 | 8.5 | 8:06 | 4:37 |
| 4 | 8.5 | 8:07 | 4:37 |
| 5 | 8.5 | 8:08 | 4:37 |
| 6 | 8.5 | 8:09 | 4:36 |
| 7 | 8.4 | 8:10 | 4:36 |
| 8 | 8.4 | 8:11 | 4:36 |
| 9 | 8.4 | 8:12 | 4:36 |
| 10 | 8.4 | 8:13 | 4:36 |
| 11 | 8.4 | 8:14 | 4:36 |
| 12 | 8.4 | 8:15 | 4:36 |
| 13 | 8.3 | 8:16 | 4:36 |
| 14 | 8.3 | 8:16 | 4:36 |
| 15 | 8.3 | 8:17 | 4:36 |
| 16 | 8.3 | 8:18 | 4:36 |
| 17 | 8.3 | 8:19 | 4:37 |
| 18 | 8.3 | 8:19 | 4:37 |
| 19 | 8.3 | 8:20 | 4:37 |
| 20 | 8.3 | 8:20 | 4:38 |
| 21 | 8.3 | 8:21 | 4:38 |
| 22 | 8.3 | 8:21 | 4:39 |
| 23 | 8.3 | 8:22 | 4:39 |
| 24 | 8.3 | 8:22 | 4:40 |
| 25 | 8.3 | 8:23 | 4:40 |
| 26 | 8.3 | 8:23 | 4:41 |
| 27 | 8.3 | 8:23 | 4:41 |
| 28 | 8.3 | 8:23 | 4:42 |
| 29 | 8.3 | 8:24 | 4:43 |
| 30 | 8.3 | 8:24 | 4:44 |
| 31 | 8.3 | 8:24 | 4:44 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 1.02 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 1.02 kWh/m² to a high of 5.63 kWh/m² in July across the year — December's 1.02 kWh/m² sits near the bottom.
| 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) | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.1 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 1.1 | Dim |
| 2 | 1.1 | Dim |
| 3 | 1.1 | Dim |
| 4 | 1.1 | Dim |
| 5 | 1.1 | Dim |
| 6 | 1.1 | Dim |
| 7 | 1.1 | Dim |
| 8 | 1.1 | Dim |
| 9 | 1.1 | Dim |
| 10 | 1.0 | Dim |
| 11 | 1.0 | Dim |
| 12 | 1.0 | Dim |
| 13 | 1.0 | Dim |
| 14 | 1.0 | Dim |
| 15 | 1.0 | Dim |
| 16 | 1.0 | Dim |
| 17 | 1.0 | Dim |
| 18 | 1.0 | Dim |
| 19 | 1.0 | Dim |
| 20 | 1.0 | Dim |
| 21 | 1.0 | Dim |
| 22 | 1.0 | Dim |
| 23 | 1.0 | Dim |
| 24 | 1.0 | Dim |
| 25 | 1.0 | Dim |
| 26 | 1.0 | Dim |
| 27 | 1.0 | Dim |
| 28 | 1.0 | Dim |
| 29 | 1.0 | Dim |
| 30 | 1.0 | Dim |
| 31 | 1.0 | Dim |
Is December a good time to visit Biel/Bienne?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Biel/Bienne.
What to pack for Biel/Bienne in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Biel/Bienne sees daytime highs around 4°C and nights near -1°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 15 days see rain.
UV index in Biel/Bienne in December
Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Biel/Bienne peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 | 4 | 5 | 7 | 7 | 8 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | Moderate | High | Very high | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 7 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Biel/Bienne?
Biel/Bienne sits at 47.1°N, 7.2°E, 434 m above sea level, in Switzerland. The nearest listed city is Grenchen, 13 km away.
Topography around Biel/Bienne
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Biel/Bienne.
Within 3 km, the terrain around Biel/Bienne has significant variations in elevation — a maximum elevation change of 562 m around an average of 541 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,170 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,796 m.
The land around Biel/Bienne is covered by trees (50%) and artificial surfaces (24%) within 3 km, trees (44%) and grassland (26%) within 16 km, and trees (47%) and grassland (33%) within 80 km.
Switzerland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / J
- 230 V · 50 Hz
- Prices
- ≈ 112% of US
- price level, 2025
- GDP per capita
- $114,769
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 2.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 564
- 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 Biel/Bienne (47.1371°, 7.2461°, elevation 434 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).