Biel/Bienne weather in April

In April, Biel/Bienne sees average daytime highs of 14°C and overnight lows near 4°C, with 105 mm of precipitation across 15.3 wet days and about 13.3 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 15°C by the end. The sky is clear or mostly clear about 21% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 30 min at the start of April to 14 h 06 min by month's end. Set against the rest of the year, April is Biel/Bienne's 6th-clearest and 5th-windiest month. For the whole year in context, see Biel/Bienne's year-round climate.

Daytime high: 14°; 6th warmest
Overnight low: 4°; 6th coldest
Precipitation: 105 mm; 15.3 wet days
Daylight: 13 h 24 min; 5:51 AM – 7:12 PM
Cloud cover: 66%; 6th clearest
Wind: 8 km/h; 5th windiest
Solar energy: 4.62 kWh/m²
Travel score: 3.4; 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.

← March Biel/Bienne year-round climate May →Best places to visit in April

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 12°C in the first days to 15°C by the end.

A typical April day in Biel/Bienne reaches about 14°C in the afternoon and slips back to 4°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 20°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

	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)	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	14	14	14	14	14	14	15	15	15	15	15	15	15	16	16
Avg low (°C)	3	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	4	4	5	5	5	5	5	6	6	6	6	6	6	7

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	3
3	12	3
4	12	3
5	12	3
6	12	3
7	12	3
8	12	3
9	13	3
10	13	3
11	13	4
12	13	4
13	13	4
14	13	4
15	13	4
16	14	4
17	14	4
18	14	4
19	14	5
20	14	5
21	14	5
22	15	5
23	15	5
24	15	6
25	15	6
26	15	6
27	15	6
28	15	6
29	16	6
30	16	7

How April really feels in Biel/Bienne

Once humidity and wind are folded in, April 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.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Biel/Bienne weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 8th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 64%. 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 (%)	37	36	36	36	36	37	37	37	37	37	38	38	38	38	38	39	39	39	38	39	37	37	35	35	34	33	32	31	30	29
Cloudier (%)	63	64	64	64	64	63	63	63	63	63	62	62	62	62	62	61	61	61	62	61	63	63	65	65	66	67	68	69	70	71

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	37	63
7	37	63
8	37	63
9	37	63
10	37	63
11	38	62
12	38	62
13	38	62
14	38	62
15	38	62
16	39	61
17	39	61
18	39	61
19	38	62
20	39	61
21	37	63
22	37	63
23	35	65
24	35	65
25	34	66
26	33	67
27	32	68
28	31	69
29	30	70
30	29	71

Chance of precipitation in April

Any precipitationSnow

Biel/Bienne gets around 105 mm of rain and snow over 15.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 51% and peaks near 59% on the wettest days, and about 2 days bring snow. 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 (%)	51	51	50	50	50	49	49	49	48	48	48	48	48	47	47	48	48	48	49	50	51	52	53	54	55	56	56	57	58	59
Snow chance (%)	13	13	12	12	11	11	10	10	10	10	10	10	9	9	9	8	8	8	7	7	7	6	6	5	5	4	3	3	2	2

	Rain chance (%)	Snow chance (%)
1	51	13
2	51	13
3	50	12
4	50	12
5	50	11
6	49	11
7	49	10
8	49	10
9	48	10
10	48	10
11	48	10
12	48	10
13	48	9
14	47	9
15	47	9
16	48	8
17	48	8
18	48	8
19	49	7
20	50	7
21	51	7
22	52	6
23	53	6
24	54	5
25	55	5
26	56	4
27	56	3
28	57	3
29	58	2
30	59	2

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April 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
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	99
Comfortable (%)	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	0	0	0	1

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1

Wind in April

Winds average 8 km/h in April.

Across April, 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
Wind speed (km/h)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	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	8	calm
2	8	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	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 30 min at the start of April to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 96 minutes over April. Sunrise moves from 6:20 AM to 5:25 AM, and sunset from 6:51 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
Daylight (h)	12.5	12.6	12.6	12.7	12.7	12.8	12.9	12.9	13.0	13.0	13.1	13.1	13.2	13.2	13.3	13.4	13.4	13.5	13.5	13.6	13.6	13.7	13.7	13.8	13.8	13.9	14.0	14.0	14.1	14.1
Sunrise (AM)	6:20	6:18	6:16	6:14	6:12	6:10	6:08	6:06	6:04	6:02	6:00	5:58	5:56	5:54	5:52	5:51	5:49	5:47	5:45	5:43	5:41	5:39	5:37	5:36	5:34	5:32	5:30	5:29	5:27	5:25
Sunset (PM)	6:51	6:52	6:54	6:55	6:56	6:58	6:59	7:01	7:02	7:04	7:05	7:06	7:08	7:09	7:11	7:12	7:13	7:15	7:16	7:18	7:19	7:20	7:22	7:23	7:25	7:26	7:27	7:29	7:30	7:32

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.5	6:20	6:51
2	12.6	6:18	6:52
3	12.6	6:16	6:54
4	12.7	6:14	6:55
5	12.7	6:12	6:56
6	12.8	6:10	6:58
7	12.9	6:08	6:59
8	12.9	6:06	7:01
9	13.0	6:04	7:02
10	13.0	6:02	7:04
11	13.1	6:00	7:05
12	13.1	5:58	7:06
13	13.2	5:56	7:08
14	13.2	5:54	7:09
15	13.3	5:52	7:11
16	13.4	5:51	7:12
17	13.4	5:49	7:13
18	13.5	5:47	7:15
19	13.5	5:45	7:16
20	13.6	5:43	7:18
21	13.6	5:41	7:19
22	13.7	5:39	7:20
23	13.7	5:37	7:22
24	13.8	5:36	7:23
25	13.8	5:34	7:25
26	13.9	5:32	7:26
27	14.0	5:30	7:27
28	14.0	5:29	7:29
29	14.1	5:27	7:30
30	14.1	5:25	7:32

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.62 kWh/m².

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 — April's 4.62 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)	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.7
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

	Solar energy (kWh/m²)	Level
1	4.1	Bright
2	4.1	Bright
3	4.2	Bright
4	4.2	Bright
5	4.3	Bright
6	4.3	Bright
7	4.3	Bright
8	4.4	Bright
9	4.4	Bright
10	4.5	Bright
11	4.5	Bright
12	4.6	Bright
13	4.6	Bright
14	4.6	Bright
15	4.7	Bright
16	4.7	Bright
17	4.7	Bright
18	4.8	Bright
19	4.8	Bright
20	4.8	Bright
21	4.8	Bright
22	4.8	Bright
23	4.8	Bright
24	4.8	Bright
25	4.8	Bright
26	4.8	Bright
27	4.7	Bright
28	4.7	Bright
29	4.7	Bright
30	4.7	Bright

Planning a trip in April

Is April a good time to visit Biel/Bienne?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.4

Sightseeing

7th-best month of the year

0.1

Beach & pool

7th-best month of the year

April is a weaker month for outdoor sightseeing in Biel/Bienne.

What to pack for Biel/Bienne in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Biel/Bienne sees daytime highs around 14°C and nights near 4°C. Pack rain gear. Worth having: a warm layer and sun protection. About 15 days see rain.

rain geara warm layersun protection

UV index in Biel/Bienne in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 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

Location & terrain

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.

3 km

562 m

trees 50%

16 km

1,170 m

trees 44%

80 km

2,796 m

trees 47%

treesgrasslandcroplandartificial surfaceswater

← March Biel/Bienne year-round climate May →Best places to visit in April

April weather nearby: Grenchen 13 km · Solothurn 23 km · Bern 26 km · Köniz 27 km · Neuchâtel 29 km · Burgdorf 30 km · La Chaux-de-Fonds 32 km · Fribourg 38 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).

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	3
3	12	3
4	12	3
5	12	3
6	12	3
7	12	3
8	12	3
9	13	3
10	13	3
11	13	4
12	13	4
13	13	4
14	13	4
15	13	4
16	14	4
17	14	4
18	14	4
19	14	5
20	14	5
21	14	5
22	15	5
23	15	5
24	15	6
25	15	6
26	15	6
27	15	6
28	15	6
29	16	6
30	16	7

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	37	63
7	37	63
8	37	63
9	37	63
10	37	63
11	38	62
12	38	62
13	38	62
14	38	62
15	38	62
16	39	61
17	39	61
18	39	61
19	38	62
20	39	61
21	37	63
22	37	63
23	35	65
24	35	65
25	34	66
26	33	67
27	32	68
28	31	69
29	30	70
30	29	71

	Rain chance (%)	Snow chance (%)
1	51	13
2	51	13
3	50	12
4	50	12
5	50	11
6	49	11
7	49	10
8	49	10
9	48	10
10	48	10
11	48	10
12	48	10
13	48	9
14	47	9
15	47	9
16	48	8
17	48	8
18	48	8
19	49	7
20	50	7
21	51	7
22	52	6
23	53	6
24	54	5
25	55	5
26	56	4
27	56	3
28	57	3
29	58	2
30	59	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	3
3	12	3
4	12	3
5	12	3
6	12	3
7	12	3
8	12	3
9	13	3
10	13	3
11	13	4
12	13	4
13	13	4
14	13	4
15	13	4
16	14	4
17	14	4
18	14	4
19	14	5
20	14	5
21	14	5
22	15	5
23	15	5
24	15	6
25	15	6
26	15	6
27	15	6
28	15	6
29	16	6
30	16	7

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	37	63
7	37	63
8	37	63
9	37	63
10	37	63
11	38	62
12	38	62
13	38	62
14	38	62
15	38	62
16	39	61
17	39	61
18	39	61
19	38	62
20	39	61
21	37	63
22	37	63
23	35	65
24	35	65
25	34	66
26	33	67
27	32	68
28	31	69
29	30	70
30	29	71

	Rain chance (%)	Snow chance (%)
1	51	13
2	51	13
3	50	12
4	50	12
5	50	11
6	49	11
7	49	10
8	49	10
9	48	10
10	48	10
11	48	10
12	48	10
13	48	9
14	47	9
15	47	9
16	48	8
17	48	8
18	48	8
19	49	7
20	50	7
21	51	7
22	52	6
23	53	6
24	54	5
25	55	5
26	56	4
27	56	3
28	57	3
29	58	2
30	59	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1

	Avg high (°C)	Avg low (°C)
1	12	3
2	12	3
3	12	3
4	12	3
5	12	3
6	12	3
7	12	3
8	12	3
9	13	3
10	13	3
11	13	4
12	13	4
13	13	4
14	13	4
15	13	4
16	14	4
17	14	4
18	14	4
19	14	5
20	14	5
21	14	5
22	15	5
23	15	5
24	15	6
25	15	6
26	15	6
27	15	6
28	15	6
29	16	6
30	16	7

	Clearer (%)	Cloudier (%)
1	37	63
2	36	64
3	36	64
4	36	64
5	36	64
6	37	63
7	37	63
8	37	63
9	37	63
10	37	63
11	38	62
12	38	62
13	38	62
14	38	62
15	38	62
16	39	61
17	39	61
18	39	61
19	38	62
20	39	61
21	37	63
22	37	63
23	35	65
24	35	65
25	34	66
26	33	67
27	32	68
28	31	69
29	30	70
30	29	71

	Rain chance (%)	Snow chance (%)
1	51	13
2	51	13
3	50	12
4	50	12
5	50	11
6	49	11
7	49	10
8	49	10
9	48	10
10	48	10
11	48	10
12	48	10
13	48	9
14	47	9
15	47	9
16	48	8
17	48	8
18	48	8
19	49	7
20	50	7
21	51	7
22	52	6
23	53	6
24	54	5
25	55	5
26	56	4
27	56	3
28	57	3
29	58	2
30	59	2

	Dry (%)	Comfortable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	99	1