Istres weather in April

In April, Istres sees average daytime highs of 19°C and overnight lows near 10°C, with 60 mm of rain across 8 wet days and about 13.2 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 44% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 54 min by month's end. Set against the rest of the year, April is Istres's 8th-clearest and 4th-windiest month. For the whole year in context, see Istres's year-round climate.

Daytime high: 19°; 7th warmest
Overnight low: 10°; 6th coldest
Rainfall: 60 mm; 8 wet days
Daylight: 13 h 12 min; 6:04 AM – 7:16 PM
Cloud cover: 49%; 8th clearest
Wind: 16 km/h; 4th windiest
Solar energy: 5.62 kWh/m²
Travel score: 6.7; out of 10

← March Istres 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 18°C in the first days to 21°C by the end.

A typical April day in Istres reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 23°C. Set against its neighbours, April runs about 3°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)	18	18	18	18	18	18	18	19	19	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20	21	21	21	21	21
Avg low (°C)	9	9	9	9	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	12	12	12

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

Istres weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	12° / 4°	52	6.5	9.1	3.4
Feb	13° / 4°	38	5.4	10.2	4.1
Mar	16° / 7°	37	5.7	11.6	6.0
Apr	19° / 10°	60	8	13.2	6.7
May	23° / 14°	50	6.5	14.5	7.5
Jun	28° / 18°	27	4.3	15.2	7.1
Jul	31° / 20°	15	2.8	14.9	5.9
Aug	30° / 20°	23	3.6	13.8	5.9
Sep	26° / 16°	74	6.3	12.3	7.5
Oct	21° / 13°	82	8.4	10.8	6.8
Nov	16° / 8°	85	9.4	9.5	5.0
Dec	12° / 5°	50	7	8.8	3.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 42%. 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 (%)	61	60	60	60	60	59	59	60	60	59	60	60	60	59	59	58	58	58	58	57	57	56	56	56	55	54	53	53	53	53
Cloudier (%)	39	40	40	40	40	41	41	40	40	41	40	40	40	41	41	42	42	42	42	43	43	44	44	44	45	46	47	47	47	47

	Clearer (%)	Cloudier (%)
1	61	39
2	60	40
3	60	40
4	60	40
5	60	40
6	59	41
7	59	41
8	60	40
9	60	40
10	59	41
11	60	40
12	60	40
13	60	40
14	59	41
15	59	41
16	58	42
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	56	44
23	56	44
24	56	44
25	55	45
26	54	46
27	53	47
28	53	47
29	53	47
30	53	47

Chance of precipitation in April

Any precipitation

Istres gets around 60 mm of rain over 8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 28% 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
Rain chance (%)	23	23	23	23	24	24	24	24	24	24	24	24	24	24	24	24	25	25	26	26	27	27	28	28	28	28	28	28	28	28

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

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 98% 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	99	99	99	99	98	98	98	97	97	96	96	96	95	95	94	94	93	93	92
Comfortable (%)	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	2	2	2	3	3	4	4	4	5	5	6	6	7	7	8

	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	99	1
13	99	1
14	99	1
15	99	1
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	96	4
22	96	4
23	96	4
24	95	5
25	95	5
26	94	6
27	94	6
28	93	7
29	93	7
30	92	8

Wind in April

Winds average 16 km/h in April.

Across April, daily wind ranges from about 15 km/h on the calmest days to 16 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)	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15	15	15	15	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	16	light breeze
2	16	light breeze
3	16	light breeze
4	16	light breeze
5	16	light breeze
6	16	light breeze
7	16	light breeze
8	16	light breeze
9	16	light breeze
10	16	light breeze
11	16	light breeze
12	16	light breeze
13	16	light breeze
14	16	light breeze
15	16	light breeze
16	16	light breeze
17	16	light breeze
18	15	light breeze
19	15	light breeze
20	15	light breeze
21	15	light breeze
22	15	light breeze
23	15	light breeze
24	15	light breeze
25	15	light breeze
26	15	light breeze
27	15	light breeze
28	15	light breeze
29	15	light breeze
30	15	light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 90 minutes over April. Sunrise moves from 6:31 AM to 5:42 AM, and sunset from 6:58 PM to 7:33 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)	12.4	12.5	12.5	12.6	12.6	12.7	12.7	12.8	12.8	12.9	12.9	13.0	13.0	13.1	13.1	13.2	13.2	13.3	13.3	13.4	13.4	13.5	13.5	13.6	13.6	13.7	13.7	13.8	13.8	13.9
Sunrise (AM)	6:31	6:29	6:28	6:26	6:24	6:22	6:20	6:19	6:17	6:15	6:13	6:11	6:10	6:08	6:06	6:04	6:03	6:01	5:59	5:58	5:56	5:54	5:53	5:51	5:50	5:48	5:46	5:45	5:43	5:42
Sunset (PM)	6:58	6:59	7:00	7:02	7:03	7:04	7:05	7:07	7:08	7:09	7:10	7:11	7:13	7:14	7:15	7:16	7:17	7:19	7:20	7:21	7:22	7:23	7:25	7:26	7:27	7:28	7:29	7:31	7:32	7:33

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.4	6:31	6:58
2	12.5	6:29	6:59
3	12.5	6:28	7:00
4	12.6	6:26	7:02
5	12.6	6:24	7:03
6	12.7	6:22	7:04
7	12.7	6:20	7:05
8	12.8	6:19	7:07
9	12.8	6:17	7:08
10	12.9	6:15	7:09
11	12.9	6:13	7:10
12	13.0	6:11	7:11
13	13.0	6:10	7:13
14	13.1	6:08	7:14
15	13.1	6:06	7:15
16	13.2	6:04	7:16
17	13.2	6:03	7:17
18	13.3	6:01	7:19
19	13.3	5:59	7:20
20	13.4	5:58	7:21
21	13.4	5:56	7:22
22	13.5	5:54	7:23
23	13.5	5:53	7:25
24	13.6	5:51	7:26
25	13.6	5:50	7:27
26	13.7	5:48	7:28
27	13.7	5:46	7:29
28	13.8	5:45	7:31
29	13.8	5:43	7:32
30	13.9	5:42	7:33

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.62 kWh/m².

For context, solar energy here swings from a low near 1.6 kWh/m² to a high of 7.31 kWh/m² in July across the year — April's 5.62 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)	5.1	5.1	5.2	5.2	5.2	5.3	5.3	5.4	5.4	5.5	5.5	5.6	5.6	5.6	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	5.9	6.0	6.0	6.0
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	Intense

	Solar energy (kWh/m²)	Level
1	5.1	Bright
2	5.1	Bright
3	5.2	Bright
4	5.2	Bright
5	5.2	Bright
6	5.3	Bright
7	5.3	Bright
8	5.4	Bright
9	5.4	Bright
10	5.5	Bright
11	5.5	Bright
12	5.6	Bright
13	5.6	Bright
14	5.6	Bright
15	5.7	Bright
16	5.7	Bright
17	5.7	Bright
18	5.8	Bright
19	5.8	Bright
20	5.8	Bright
21	5.8	Bright
22	5.8	Bright
23	5.9	Bright
24	5.9	Bright
25	5.9	Bright
26	5.9	Bright
27	5.9	Bright
28	6.0	Bright
29	6.0	Bright
30	6.0	Intense

Planning a trip in April

Is April a good time to visit Istres?

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

6.7

Sightseeing

5th-best month of the year

3.1

Beach & pool

7th-best month of the year

April is a reasonable time to visit Istres for sightseeing.

What to pack for Istres in April

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

In April, Istres sees daytime highs around 19°C and nights near 10°C. Worth packing: rain gear and sun protection. About 8 days see rain.

rain gearsun protection

Sea temperature near Istres in April

The nearest coast averages about 14°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in August at about 22°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 28 to Sep 24 — about 2.9 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	13	12	13	14	16	19	21	22	21	19	17	14
Comfort	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Refreshing	Refreshing	Refreshing	Cool	Cool	Bracing

	Sea temperature (°C)	Comfort
Jan	13	Bracing
Feb	12	Bracing
Mar	13	Bracing
Apr	14	Bracing
May	16	Cool
Jun	19	Cool
Jul	21	Refreshing
Aug	22	Refreshing
Sep	21	Refreshing
Oct	19	Cool
Nov	17	Cool
Dec	14	Bracing

UV index in Istres in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Istres peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. 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 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	4	6	6	7	9	7	5	3	2	1
Level	Low	Moderate	Moderate	High	High	Very high	Very high	High	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Moderate
Mar	4	Moderate
Apr	6	High
May	6	High
Jun	7	Very high
Jul	9	Very high
Aug	7	High
Sep	5	High
Oct	3	Moderate
Nov	2	Low
Dec	1	Low

Air quality in Istres 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 Istres is worst in March — around 17 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)	13	15	17	17	15	16	14	15	13	13	11	12
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	15	Moderate
Mar	17	Moderate
Apr	17	Moderate
May	15	Moderate
Jun	16	Moderate
Jul	14	Moderate
Aug	15	Moderate
Sep	13	Moderate
Oct	13	Moderate
Nov	11	Good
Dec	12	Moderate

Location & terrain

Where is Istres?

Istres sits at 43.5°N, 5.0°E, 14 m above sea level, in France. The nearest listed city is Miramas, 8.0 km away.

Topography around Istres

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

Within 3 km, the terrain around Istres has only modest variations in elevation — a maximum elevation change of 116 m around an average of 21 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 201 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,897 m.

The land around Istres is covered by water (30%), artificial surfaces (28%) and trees (20%) within 3 km, grassland (26%), water (24%) and trees (20%) within 16 km, and trees (38%) and water (31%) within 80 km.

3 km

116 m

water 30%

16 km

201 m

grassland 26%

80 km

1,897 m

trees 38%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

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

April weather nearby: Miramas 8.0 km · Fos-sur-Mer 9.0 km · Port-de-Bouc 12 km · Martigues 13 km · Salon-de-Provence 17 km · Marignane 21 km · Vitrolles 22 km · Les Pennes-Mirabeau 28 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 Istres (43.5134°, 4.9875°, 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).

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

	Clearer (%)	Cloudier (%)
1	61	39
2	60	40
3	60	40
4	60	40
5	60	40
6	59	41
7	59	41
8	60	40
9	60	40
10	59	41
11	60	40
12	60	40
13	60	40
14	59	41
15	59	41
16	58	42
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	56	44
23	56	44
24	56	44
25	55	45
26	54	46
27	53	47
28	53	47
29	53	47
30	53	47

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

	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	99	1
13	99	1
14	99	1
15	99	1
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	96	4
22	96	4
23	96	4
24	95	5
25	95	5
26	94	6
27	94	6
28	93	7
29	93	7
30	92	8

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

	Clearer (%)	Cloudier (%)
1	61	39
2	60	40
3	60	40
4	60	40
5	60	40
6	59	41
7	59	41
8	60	40
9	60	40
10	59	41
11	60	40
12	60	40
13	60	40
14	59	41
15	59	41
16	58	42
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	56	44
23	56	44
24	56	44
25	55	45
26	54	46
27	53	47
28	53	47
29	53	47
30	53	47

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

	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	99	1
13	99	1
14	99	1
15	99	1
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	96	4
22	96	4
23	96	4
24	95	5
25	95	5
26	94	6
27	94	6
28	93	7
29	93	7
30	92	8

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

	Clearer (%)	Cloudier (%)
1	61	39
2	60	40
3	60	40
4	60	40
5	60	40
6	59	41
7	59	41
8	60	40
9	60	40
10	59	41
11	60	40
12	60	40
13	60	40
14	59	41
15	59	41
16	58	42
17	58	42
18	58	42
19	58	42
20	57	43
21	57	43
22	56	44
23	56	44
24	56	44
25	55	45
26	54	46
27	53	47
28	53	47
29	53	47
30	53	47

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

	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	99	1
13	99	1
14	99	1
15	99	1
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	96	4
22	96	4
23	96	4
24	95	5
25	95	5
26	94	6
27	94	6
28	93	7
29	93	7
30	92	8