Saarlouis weather in April

In April, Saarlouis sees average daytime highs of 14°C and overnight lows near 5°C, with 57 mm of precipitation across 10.8 wet days and about 13.4 hours of daylight. It is the 6th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 16°C by the end. The sky is clear or mostly clear about 24% 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 18 min by month's end. Set against the rest of the year, April is Saarlouis's 4th-clearest and 7th-windiest month. For the whole year in context, see Saarlouis's year-round climate.

Daytime high: 14°; 6th warmest
Overnight low: 5°; 6th coldest
Precipitation: 57 mm; 10.8 wet days
Daylight: 13 h 30 min; 5:49 AM – 7:17 PM
Cloud cover: 64%; 4th clearest
Wind: 12 km/h; 7th windiest
Solar energy: 4.52 kWh/m²
Travel score: 4.1; out of 10

Air quality: Good; PM10 16.9 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← March Saarlouis 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 16°C by the end.

A typical April day in Saarlouis reaches about 14°C in the afternoon and slips back to 5°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 21°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	13	13	13	13	13	13	13	13	14	14	14	14	14	14	15	15	15	15	15	16	16	16	16	16	16	16	17	17
Avg low (°C)	4	4	4	4	4	4	4	4	4	5	5	5	5	5	5	5	5	6	6	6	6	6	6	7	7	7	7	7	7	8

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

How April really feels in Saarlouis

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.

Saarlouis weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 12th-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° / -0°	86	13.2	3.1	8.4	0.0
Feb	6° / 0°	71	11	3.3	9.8	0.3
Mar	10° / 3°	73	12	1.5	11.5	2.2
Apr	14° / 5°	57	10.8	0.1	13.4	4.1
May	18° / 9°	72	12.7	0	15.1	5.5
Jun	22° / 12°	65	11	0	15.9	6.3
Jul	24° / 14°	66	11.1	0	15.6	6.7
Aug	24° / 14°	64	11.1	0	14.2	6.7
Sep	19° / 11°	68	9.8	0	12.4	6.0
Oct	14° / 7°	76	11.9	0	10.5	3.8
Nov	8° / 4°	80	12.7	1	8.9	1.3
Dec	5° / 1°	107	15	3.3	8	0.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 63%.

	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 (%)	35	35	35	35	35	35	35	35	37	37	37	38	38	38	39	39	40	40	39	39	38	38	37	37	37	36	36	35	35	34
Cloudier (%)	65	65	65	65	65	65	65	65	63	63	63	62	62	62	61	61	60	60	61	61	62	62	63	63	63	64	64	65	65	66

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	37	63
10	37	63
11	37	63
12	38	62
13	38	62
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	39	61
20	39	61
21	38	62
22	38	62
23	37	63
24	37	63
25	37	63
26	36	64
27	36	64
28	35	65
29	35	65
30	34	66

Chance of precipitation in April

Any precipitationSnow

Saarlouis gets around 57 mm of rain and snow over 10.8 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 36% and peaks near 43% on the wettest days, and about 0 day brings 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
Rain chance (%)	38	37	37	36	36	36	35	35	35	34	34	34	33	33	33	33	33	33	34	35	35	36	37	38	39	40	40	41	42	43
Snow chance (%)	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Rain chance (%)	Snow chance (%)
1	38	2
2	37	2
3	37	1
4	36	1
5	36	1
6	36	1
7	35	1
8	35	1
9	35	1
10	34	1
11	34	1
12	34	1
13	33	1
14	33	1
15	33	1
16	33	1
17	33	0
18	33	0
19	34	0
20	35	0
21	35	0
22	36	0
23	37	0
24	38	0
25	39	0
26	40	0
27	40	0
28	41	0
29	42	0
30	43	0

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	99	99	99	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	1	1	1	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	99	1
28	99	1
29	99	1
30	99	1

Wind in April

Winds average 12 km/h in April.

Across April, daily wind ranges from about 11 km/h on the calmest days to 13 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)	13	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	11	11
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	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	13	light breeze
2	12	light breeze
3	12	light breeze
4	12	light breeze
5	12	light breeze
6	12	light breeze
7	12	light breeze
8	12	light breeze
9	12	light breeze
10	12	light breeze
11	12	calm
12	12	calm
13	12	calm
14	12	calm
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	12	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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 30 min at the start of April to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 108 minutes over April. Sunrise moves from 6:21 AM to 5:22 AM, and sunset from 6:54 PM to 7:39 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	12.7	12.7	12.8	12.9	12.9	13.0	13.0	13.1	13.2	13.2	13.3	13.3	13.4	13.5	13.5	13.6	13.6	13.7	13.8	13.8	13.9	13.9	14.0	14.1	14.1	14.2	14.2	14.3
Sunrise (AM)	6:21	6:19	6:17	6:15	6:13	6:10	6:08	6:06	6:04	6:02	6:00	5:58	5:55	5:53	5:51	5:49	5:47	5:45	5:43	5:41	5:39	5:37	5:35	5:33	5:31	5:29	5:27	5:26	5:24	5:22
Sunset (PM)	6:54	6:56	6:57	6:59	7:00	7:02	7:03	7:05	7:06	7:08	7:10	7:11	7:13	7:14	7:16	7:17	7:19	7:20	7:22	7:23	7:25	7:26	7:28	7:30	7:31	7:33	7:34	7:36	7:37	7:39

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.5	6:21	6:54
2	12.6	6:19	6:56
3	12.7	6:17	6:57
4	12.7	6:15	6:59
5	12.8	6:13	7:00
6	12.9	6:10	7:02
7	12.9	6:08	7:03
8	13.0	6:06	7:05
9	13.0	6:04	7:06
10	13.1	6:02	7:08
11	13.2	6:00	7:10
12	13.2	5:58	7:11
13	13.3	5:55	7:13
14	13.3	5:53	7:14
15	13.4	5:51	7:16
16	13.5	5:49	7:17
17	13.5	5:47	7:19
18	13.6	5:45	7:20
19	13.6	5:43	7:22
20	13.7	5:41	7:23
21	13.8	5:39	7:25
22	13.8	5:37	7:26
23	13.9	5:35	7:28
24	13.9	5:33	7:30
25	14.0	5:31	7:31
26	14.1	5:29	7:33
27	14.1	5:27	7:34
28	14.2	5:26	7:36
29	14.2	5:24	7:37
30	14.3	5:22	7:39

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.52 kWh/m².

For context, solar energy here swings from a low near 0.7 kWh/m² to a high of 5.61 kWh/m² in June across the year — April's 4.52 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)	3.9	3.9	4.0	4.0	4.1	4.1	4.2	4.2	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	4.9	4.9
Level	Moderate	Moderate	Moderate	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	3.9	Moderate
2	3.9	Moderate
3	4.0	Moderate
4	4.0	Bright
5	4.1	Bright
6	4.1	Bright
7	4.2	Bright
8	4.2	Bright
9	4.3	Bright
10	4.3	Bright
11	4.4	Bright
12	4.4	Bright
13	4.5	Bright
14	4.5	Bright
15	4.6	Bright
16	4.6	Bright
17	4.6	Bright
18	4.7	Bright
19	4.7	Bright
20	4.7	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	4.8	Bright
28	4.8	Bright
29	4.9	Bright
30	4.9	Bright

Planning a trip in April

Is April a good time to visit Saarlouis?

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

4.1

Sightseeing

6th-best month of the year

0.2

Beach & pool

6th-best month of the year

April is a reasonable time to visit Saarlouis for sightseeing.

What to pack for Saarlouis in April

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

In April, Saarlouis sees daytime highs around 14°C and nights near 5°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

UV index in Saarlouis in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saarlouis peaks around July 16 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 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	4	6	7	8	7	4	3	1	1
Level	Low	Low	Moderate	Moderate	High	High	Very high	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	3	Moderate
Apr	4	Moderate
May	6	High
Jun	7	High
Jul	8	Very high
Aug	7	High
Sep	4	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Air quality in Saarlouis in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in Saarlouis is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 9 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)	10	11	14	15	13	14	12	12	12	10	9	9
Level	Good	Good	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	11	Good
Mar	14	Moderate
Apr	15	Moderate
May	13	Moderate
Jun	14	Moderate
Jul	12	Good
Aug	12	Good
Sep	12	Good
Oct	10	Good
Nov	9	Good
Dec	9	Good

Location & terrain

Where is Saarlouis?

Saarlouis sits at 49.3°N, 6.8°E, 183 m above sea level, in Germany. The nearest listed city is Dillingen, 5.0 km away.

Topography around Saarlouis

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saarlouis.

Within 3 km, the terrain around Saarlouis has only modest variations in elevation — a maximum elevation change of 153 m around an average of 197 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 270 m; within 80 km, large variations in elevation — a maximum elevation change of 724 m.

The land around Saarlouis is covered by trees (42%) and artificial surfaces (31%) within 3 km, trees (54%) within 16 km, and trees (48%), cropland (25%) and grassland (21%) within 80 km.

3 km

153 m

trees 42%

16 km

270 m

trees 54%

80 km

724 m

trees 48%

treesgrasslandcroplandartificial surfaceswater

← March Saarlouis year-round climate May →Best places to visit in April

April weather nearby: Dillingen 5.0 km · Schwalbach 5.0 km · Wadgassen 6.0 km · Beckingen 10 km · Püttlingen 10 km · Völklingen 10 km · Heusweiler 13 km · Riegelsberg 13 km

Germany travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 80% of US; price level, 2025
GDP per capita: $60,496; 2025
Happiness: 6.9 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 0.9; per 100k, 2023
Road deaths: 3.8; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 615
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 Saarlouis (49.3137°, 6.7515°, elevation 183 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).

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

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	37	63
10	37	63
11	37	63
12	38	62
13	38	62
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	39	61
20	39	61
21	38	62
22	38	62
23	37	63
24	37	63
25	37	63
26	36	64
27	36	64
28	35	65
29	35	65
30	34	66

	Rain chance (%)	Snow chance (%)
1	38	2
2	37	2
3	37	1
4	36	1
5	36	1
6	36	1
7	35	1
8	35	1
9	35	1
10	34	1
11	34	1
12	34	1
13	33	1
14	33	1
15	33	1
16	33	1
17	33	0
18	33	0
19	34	0
20	35	0
21	35	0
22	36	0
23	37	0
24	38	0
25	39	0
26	40	0
27	40	0
28	41	0
29	42	0
30	43	0

	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	99	1
28	99	1
29	99	1
30	99	1

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

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	37	63
10	37	63
11	37	63
12	38	62
13	38	62
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	39	61
20	39	61
21	38	62
22	38	62
23	37	63
24	37	63
25	37	63
26	36	64
27	36	64
28	35	65
29	35	65
30	34	66

	Rain chance (%)	Snow chance (%)
1	38	2
2	37	2
3	37	1
4	36	1
5	36	1
6	36	1
7	35	1
8	35	1
9	35	1
10	34	1
11	34	1
12	34	1
13	33	1
14	33	1
15	33	1
16	33	1
17	33	0
18	33	0
19	34	0
20	35	0
21	35	0
22	36	0
23	37	0
24	38	0
25	39	0
26	40	0
27	40	0
28	41	0
29	42	0
30	43	0

	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	99	1
28	99	1
29	99	1
30	99	1

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

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	35	65
4	35	65
5	35	65
6	35	65
7	35	65
8	35	65
9	37	63
10	37	63
11	37	63
12	38	62
13	38	62
14	38	62
15	39	61
16	39	61
17	40	60
18	40	60
19	39	61
20	39	61
21	38	62
22	38	62
23	37	63
24	37	63
25	37	63
26	36	64
27	36	64
28	35	65
29	35	65
30	34	66

	Rain chance (%)	Snow chance (%)
1	38	2
2	37	2
3	37	1
4	36	1
5	36	1
6	36	1
7	35	1
8	35	1
9	35	1
10	34	1
11	34	1
12	34	1
13	33	1
14	33	1
15	33	1
16	33	1
17	33	0
18	33	0
19	34	0
20	35	0
21	35	0
22	36	0
23	37	0
24	38	0
25	39	0
26	40	0
27	40	0
28	41	0
29	42	0
30	43	0

	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	99	1
28	99	1
29	99	1
30	99	1