Blackwood weather in April

In April, Blackwood sees average daytime highs of 12°C and overnight lows near 4°C, with 80 mm of precipitation across 12.9 wet days and about 13.6 hours of daylight. It is the 7th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 11°C in the first days to 13°C by the end. The sky is clear or mostly clear about 14% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 36 min at the start of April to 14 h 30 min by month's end. Set against the rest of the year, April is Blackwood's 2nd-clearest and 7th-windiest month. For the whole year in context, see Blackwood's year-round climate.

Daytime high: 12°; 7th warmest
Overnight low: 4°; 6th coldest
Precipitation: 80 mm; 12.9 wet days
Daylight: 13 h 36 min; 5:25 AM – 7:01 PM
Cloud cover: 72%; 2nd clearest
Wind: 14 km/h; 7th windiest
Solar energy: 4.1 kWh/m²
Travel score: 2.8; out of 10

Blackwood is town and community in Caerphilly County Borough, Wales.

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

← March Blackwood 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 11°C in the first days to 13°C by the end.

A typical April day in Blackwood reaches about 12°C in the afternoon and slips back to 4°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 16°C. Set against its neighbours, April runs about 3°C warmer than March and about 3°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)	10	10	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13
Avg low (°C)	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	5	5	5	5	5	5	5	5	6

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

How April really feels in Blackwood

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 3 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

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Blackwood weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	6° / 2°	100	14.6	1.7	8.1	0.5
Feb	7° / 2°	80	11.4	1.9	9.6	0.7
Mar	9° / 3°	76	12.7	1.4	11.5	1.6
Apr	12° / 4°	80	12.9	0.5	13.6	2.8
May	15° / 7°	89	13.6	0	15.4	3.9
Jun	17° / 10°	83	12.2	0	16.3	5.0
Jul	19° / 12°	84	13	0	15.9	5.6
Aug	19° / 12°	90	12.6	0	14.4	5.5
Sep	16° / 10°	77	11.2	0	12.4	4.8
Oct	13° / 7°	111	13.6	0.1	10.4	3.1
Nov	9° / 4°	103	13.9	0.6	8.6	1.7
Dec	7° / 2°	108	13.3	1.6	7.7	0.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 70%.

	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 (%)	30	30	30	29	30	30	30	30	30	30	30	32	32	32	30	30	30	30	30	30	29	29	29	29	30	29	29	29	29	29
Cloudier (%)	70	70	70	71	70	70	70	70	70	70	70	68	68	68	70	70	70	70	70	70	71	71	71	71	70	71	71	71	71	71

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	29	71
5	30	70
6	30	70
7	30	70
8	30	70
9	30	70
10	30	70
11	30	70
12	32	68
13	32	68
14	32	68
15	30	70
16	30	70
17	30	70
18	30	70
19	30	70
20	30	70
21	29	71
22	29	71
23	29	71
24	29	71
25	30	70
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

Chance of precipitation in April

Any precipitationSnow

Blackwood gets around 80 mm of rain and snow over 12.9 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 42% and peaks near 45% on the wettest days, and about 1 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 (%)	42	42	42	41	41	40	40	39	39	39	38	38	38	39	39	40	41	42	43	43	44	45	45	45	45	45	45	45	44	44
Snow chance (%)	3	3	3	3	3	3	3	3	3	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0

	Rain chance (%)	Snow chance (%)
1	42	3
2	42	3
3	42	3
4	41	3
5	41	3
6	40	3
7	40	3
8	39	3
9	39	3
10	39	2
11	38	2
12	38	2
13	38	2
14	39	2
15	39	2
16	40	1
17	41	1
18	42	1
19	43	1
20	43	1
21	44	1
22	45	1
23	45	1
24	45	1
25	45	1
26	45	0
27	45	0
28	45	0
29	44	0
30	44	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	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

Wind in April

Winds average 14 km/h in April.

Across April, daily wind ranges from about 13 km/h on the calmest days to 14 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)	14	14	14	14	14	14	14	14	14	14	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	14
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	14	light breeze
2	14	light breeze
3	14	light breeze
4	14	light breeze
5	14	light breeze
6	14	light breeze
7	14	light breeze
8	14	light breeze
9	14	light breeze
10	14	light breeze
11	13	light breeze
12	13	light breeze
13	13	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	14	light breeze
21	14	light breeze
22	14	light breeze
23	14	light breeze
24	14	light breeze
25	14	light breeze
26	14	light breeze
27	14	light breeze
28	14	light breeze
29	14	light breeze
30	14	light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 36 min at the start of April to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 114 minutes over April. Sunrise moves from 6:00 AM to 4:56 AM, and sunset from 6:35 PM to 7:25 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)	12.6	12.7	12.7	12.8	12.9	12.9	13.0	13.1	13.1	13.2	13.3	13.3	13.4	13.5	13.5	13.6	13.7	13.7	13.8	13.9	13.9	14.0	14.0	14.1	14.2	14.2	14.3	14.4	14.4	14.5
Sunrise (AM)	6:00	5:57	5:55	5:53	5:50	5:48	5:46	5:43	5:41	5:39	5:36	5:34	5:32	5:30	5:27	5:25	5:23	5:21	5:19	5:16	5:14	5:12	5:10	5:08	5:06	5:04	5:02	5:00	4:58	4:56
Sunset (PM)	6:35	6:37	6:39	6:40	6:42	6:44	6:46	6:47	6:49	6:51	6:52	6:54	6:56	6:58	6:59	7:01	7:03	7:04	7:06	7:08	7:09	7:11	7:13	7:15	7:16	7:18	7:20	7:21	7:23	7:25

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.6	6:00	6:35
2	12.7	5:57	6:37
3	12.7	5:55	6:39
4	12.8	5:53	6:40
5	12.9	5:50	6:42
6	12.9	5:48	6:44
7	13.0	5:46	6:46
8	13.1	5:43	6:47
9	13.1	5:41	6:49
10	13.2	5:39	6:51
11	13.3	5:36	6:52
12	13.3	5:34	6:54
13	13.4	5:32	6:56
14	13.5	5:30	6:58
15	13.5	5:27	6:59
16	13.6	5:25	7:01
17	13.7	5:23	7:03
18	13.7	5:21	7:04
19	13.8	5:19	7:06
20	13.9	5:16	7:08
21	13.9	5:14	7:09
22	14.0	5:12	7:11
23	14.0	5:10	7:13
24	14.1	5:08	7:15
25	14.2	5:06	7:16
26	14.2	5:04	7:18
27	14.3	5:02	7:20
28	14.4	5:00	7:21
29	14.4	4:58	7:23
30	14.5	4:56	7:25

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.1 kWh/m².

For context, solar energy here swings from a low near 0.63 kWh/m² to a high of 5.27 kWh/m² in June across the year — April's 4.1 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)	3.4	3.5	3.5	3.6	3.6	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.4	4.5	4.5	4.5	4.6	4.6	4.7
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	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	3.4	Moderate
2	3.5	Moderate
3	3.5	Moderate
4	3.6	Moderate
5	3.6	Moderate
6	3.7	Moderate
7	3.8	Moderate
8	3.8	Moderate
9	3.9	Moderate
10	3.9	Moderate
11	4.0	Moderate
12	4.0	Bright
13	4.0	Bright
14	4.1	Bright
15	4.1	Bright
16	4.2	Bright
17	4.2	Bright
18	4.2	Bright
19	4.3	Bright
20	4.3	Bright
21	4.3	Bright
22	4.4	Bright
23	4.4	Bright
24	4.4	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.6	Bright
29	4.6	Bright
30	4.7	Bright

Planning a trip in April

Is April a good time to visit Blackwood?

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

2.8

Sightseeing

7th-best month of the year

0.0

Beach & pool

7th-best month of the year

April is a weaker month for outdoor sightseeing in Blackwood.

What to pack for Blackwood in April

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

In April, Blackwood sees daytime highs around 12°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Blackwood in April

The nearest coast averages about 9°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 33 km away) is warmest in August at about 18°C and coldest in February near 7°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	8	7	8	9	12	15	17	18	17	15	12	9
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	8	Bracing
Feb	7	Bracing
Mar	8	Bracing
Apr	9	Bracing
May	12	Bracing
Jun	15	Cool
Jul	17	Cool
Aug	18	Cool
Sep	17	Cool
Oct	15	Bracing
Nov	12	Bracing
Dec	9	Bracing

UV index in Blackwood 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 Blackwood peaks around August 13 at about 6 (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 6 months of the year.

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

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

Location & terrain

Where is Blackwood?

Blackwood sits at 51.7°N, 3.2°W, 227 m above sea level, in United Kingdom. The nearest listed city is Gelligaer, 3.0 km away.

Topography around Blackwood

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

Within 3 km, the terrain around Blackwood has only modest variations in elevation — a maximum elevation change of 201 m around an average of 198 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 568 m; within 80 km, large variations in elevation — a maximum elevation change of 864 m.

The land around Blackwood is covered by trees (46%), grassland (28%) and artificial surfaces (26%) within 3 km, grassland (47%) and trees (40%) within 16 km, and grassland (52%) within 80 km.

3 km

201 m

trees 46%

16 km

568 m

grassland 47%

80 km

864 m

grassland 52%

treesgrasslandcroplandartificial surfaceswater

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

April weather nearby: Gelligaer 3.0 km · Risca 10 km · Caerphilly 10 km · Pontypridd 12 km · Pontypool 12 km · Ebbw Vale 12 km · Cwmbran 13 km · Merthyr Tydfil 15 km

United Kingdom travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type D / G / M; 230 V · 50 Hz
Prices: ≈ 89% of US; price level, 2025
GDP per capita: $57,602; 2025
Happiness: 6.7 / 10; World Happiness, 2025
Safe drinking water: 100%; of population, 2024
Homicide rate: 1.1; per 100k, 2021
Road deaths: 3.2; per 100k/yr, 2019
Income group: High; World Bank
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 Blackwood (51.6678°, -3.2075°, elevation 227 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. 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	10	3
2	10	3
3	11	3
4	11	4
5	11	4
6	11	4
7	11	4
8	11	4
9	11	4
10	11	4
11	11	4
12	11	4
13	11	4
14	12	4
15	12	4
16	12	4
17	12	4
18	12	4
19	12	5
20	12	5
21	12	5
22	12	5
23	12	5
24	12	5
25	13	5
26	13	5
27	13	5
28	13	5
29	13	5
30	13	6

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	29	71
5	30	70
6	30	70
7	30	70
8	30	70
9	30	70
10	30	70
11	30	70
12	32	68
13	32	68
14	32	68
15	30	70
16	30	70
17	30	70
18	30	70
19	30	70
20	30	70
21	29	71
22	29	71
23	29	71
24	29	71
25	30	70
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

	Rain chance (%)	Snow chance (%)
1	42	3
2	42	3
3	42	3
4	41	3
5	41	3
6	40	3
7	40	3
8	39	3
9	39	3
10	39	2
11	38	2
12	38	2
13	38	2
14	39	2
15	39	2
16	40	1
17	41	1
18	42	1
19	43	1
20	43	1
21	44	1
22	45	1
23	45	1
24	45	1
25	45	1
26	45	0
27	45	0
28	45	0
29	44	0
30	44	0

	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

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

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	29	71
5	30	70
6	30	70
7	30	70
8	30	70
9	30	70
10	30	70
11	30	70
12	32	68
13	32	68
14	32	68
15	30	70
16	30	70
17	30	70
18	30	70
19	30	70
20	30	70
21	29	71
22	29	71
23	29	71
24	29	71
25	30	70
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

	Rain chance (%)	Snow chance (%)
1	42	3
2	42	3
3	42	3
4	41	3
5	41	3
6	40	3
7	40	3
8	39	3
9	39	3
10	39	2
11	38	2
12	38	2
13	38	2
14	39	2
15	39	2
16	40	1
17	41	1
18	42	1
19	43	1
20	43	1
21	44	1
22	45	1
23	45	1
24	45	1
25	45	1
26	45	0
27	45	0
28	45	0
29	44	0
30	44	0

	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

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

	Clearer (%)	Cloudier (%)
1	30	70
2	30	70
3	30	70
4	29	71
5	30	70
6	30	70
7	30	70
8	30	70
9	30	70
10	30	70
11	30	70
12	32	68
13	32	68
14	32	68
15	30	70
16	30	70
17	30	70
18	30	70
19	30	70
20	30	70
21	29	71
22	29	71
23	29	71
24	29	71
25	30	70
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

	Rain chance (%)	Snow chance (%)
1	42	3
2	42	3
3	42	3
4	41	3
5	41	3
6	40	3
7	40	3
8	39	3
9	39	3
10	39	2
11	38	2
12	38	2
13	38	2
14	39	2
15	39	2
16	40	1
17	41	1
18	42	1
19	43	1
20	43	1
21	44	1
22	45	1
23	45	1
24	45	1
25	45	1
26	45	0
27	45	0
28	45	0
29	44	0
30	44	0

	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