Karlštejn weather in April

In April, Karlštejn sees average daytime highs of 14°C and overnight lows near 4°C, with 40 mm of precipitation across 10 wet days and about 13.5 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 17°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 36 min at the start of April to 14 h 18 min by month's end. Set against the rest of the year, April is Karlštejn's 3rd-clearest and 7th-windiest month. For the whole year in context, see Karlštejn's year-round climate.

Daytime high: 14°; 6th warmest
Overnight low: 4°; 6th coldest
Precipitation: 40 mm; 10 wet days
Daylight: 13 h 30 min; 5:18 AM – 6:48 PM
Cloud cover: 62%; 3rd clearest
Wind: 11 km/h; 7th windiest
Solar energy: 4.51 kWh/m²
Travel score: 4.0; out of 10

Karlštejn is market town in Czech Republic.

Density: 58/km²; people per km²
Founded: 1348

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

← March Karlštejn 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 17°C by the end.

A typical April day in Karlštejn reaches about 14°C in the afternoon and slips back to 4°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 21°C. Set against its neighbours, April runs about 6°C warmer than March and about 5°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)	11	12	12	12	12	12	12	12	12	13	13	13	13	13	14	14	14	14	15	15	15	15	16	16	16	16	17	17	17	17
Avg low (°C)	2	3	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	5	5	5	5	5	6	6	6	6	6	7	7	7

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

How April really feels in Karlštejn

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 7 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.

Karlštejn 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	2° / -3°	36	9.7	5.3	8.4	0.0
Feb	4° / -2°	31	8.1	3.8	9.7	0.0
Mar	8° / 1°	43	10.8	2.9	11.5	1.5
Apr	14° / 4°	40	10	0.7	13.5	4.0
May	19° / 9°	71	13.3	0	15.1	5.5
Jun	22° / 12°	77	12	0	16	6.2
Jul	24° / 14°	81	12.8	0	15.7	6.5
Aug	24° / 14°	78	11	0	14.3	6.7
Sep	19° / 10°	58	9.5	0	12.4	5.9
Oct	13° / 6°	45	9.7	0.1	10.5	3.6
Nov	7° / 2°	39	8.7	1.5	8.8	0.9
Dec	3° / -1°	37	9.3	4	7.9	0.0

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 17% of April, with mostly cloudy or overcast conditions the remaining 59%.

	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 (%)	38	38	37	37	37	37	36	36	36	35	36	37	39	40	41	43	43	45	45	46	46	47	47	47	46	45	44	43	43	41
Cloudier (%)	62	62	63	63	63	63	64	64	64	65	64	63	61	60	59	57	57	55	55	54	54	53	53	53	54	55	56	57	57	59

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	36	64
10	35	65
11	36	64
12	37	63
13	39	61
14	40	60
15	41	59
16	43	57
17	43	57
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	47	53
24	47	53
25	46	54
26	45	55
27	44	56
28	43	57
29	43	57
30	41	59

Chance of precipitation in April

Any precipitationSnow

Karlštejn gets around 40 mm of rain and snow over 10 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 34% and peaks near 38% 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 (%)	33	33	32	32	33	33	33	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	35	35	36	37	38	38
Snow chance (%)	5	5	5	5	5	5	5	4	4	4	4	4	3	3	3	3	3	2	2	2	1	1	1	1	0	0	0	0	0	0

	Rain chance (%)	Snow chance (%)
1	33	5
2	33	5
3	32	5
4	32	5
5	33	5
6	33	5
7	33	5
8	34	4
9	34	4
10	34	4
11	34	4
12	34	4
13	34	3
14	34	3
15	34	3
16	34	3
17	34	3
18	34	2
19	34	2
20	34	2
21	34	1
22	34	1
23	34	1
24	34	1
25	35	0
26	35	0
27	36	0
28	37	0
29	38	0
30	38	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	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	0	0	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	100	0
28	100	0
29	99	1
30	99	1

Wind in April

Winds average 11 km/h in April.

Across April, daily wind ranges from about 11 km/h on the calmest days to 12 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)	12	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
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	12	calm
2	12	calm
3	12	calm
4	12	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	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 36 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 102 minutes over April. Sunrise moves from 5:51 AM to 4:51 AM, and sunset from 6:25 PM to 7:11 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	12.6	12.7	12.7	12.8	12.9	12.9	13.0	13.1	13.1	13.2	13.3	13.3	13.4	13.4	13.5	13.6	13.6	13.7	13.7	13.8	13.9	13.9	14.0	14.0	14.1	14.2	14.2	14.3	14.3
Sunrise (AM)	5:51	5:49	5:47	5:44	5:42	5:40	5:38	5:36	5:33	5:31	5:29	5:27	5:25	5:23	5:21	5:18	5:16	5:14	5:12	5:10	5:08	5:06	5:04	5:02	5:00	4:58	4:56	4:54	4:53	4:51
Sunset (PM)	6:25	6:26	6:28	6:29	6:31	6:33	6:34	6:36	6:37	6:39	6:41	6:42	6:44	6:45	6:47	6:48	6:50	6:52	6:53	6:55	6:56	6:58	7:00	7:01	7:03	7:04	7:06	7:07	7:09	7:11

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.6	5:51	6:25
2	12.6	5:49	6:26
3	12.7	5:47	6:28
4	12.7	5:44	6:29
5	12.8	5:42	6:31
6	12.9	5:40	6:33
7	12.9	5:38	6:34
8	13.0	5:36	6:36
9	13.1	5:33	6:37
10	13.1	5:31	6:39
11	13.2	5:29	6:41
12	13.3	5:27	6:42
13	13.3	5:25	6:44
14	13.4	5:23	6:45
15	13.4	5:21	6:47
16	13.5	5:18	6:48
17	13.6	5:16	6:50
18	13.6	5:14	6:52
19	13.7	5:12	6:53
20	13.7	5:10	6:55
21	13.8	5:08	6:56
22	13.9	5:06	6:58
23	13.9	5:04	7:00
24	14.0	5:02	7:01
25	14.0	5:00	7:03
26	14.1	4:58	7:04
27	14.2	4:56	7:06
28	14.2	4:54	7:07
29	14.3	4:53	7:09
30	14.3	4:51	7:11

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.51 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 5.47 kWh/m² in June across the year — April's 4.51 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)	3.8	3.8	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.4	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.8	4.9	4.9	4.9	5.0	5.0	5.0	5.0
Level	Moderate	Moderate	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

	Solar energy (kWh/m²)	Level
1	3.8	Moderate
2	3.8	Moderate
3	3.9	Moderate
4	3.9	Moderate
5	4.0	Moderate
6	4.0	Bright
7	4.0	Bright
8	4.1	Bright
9	4.1	Bright
10	4.2	Bright
11	4.2	Bright
12	4.3	Bright
13	4.3	Bright
14	4.4	Bright
15	4.4	Bright
16	4.5	Bright
17	4.6	Bright
18	4.6	Bright
19	4.7	Bright
20	4.7	Bright
21	4.8	Bright
22	4.8	Bright
23	4.8	Bright
24	4.9	Bright
25	4.9	Bright
26	4.9	Bright
27	5.0	Bright
28	5.0	Bright
29	5.0	Bright
30	5.0	Bright

Planning a trip in April

Is April a good time to visit Karlštejn?

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

4.0

Sightseeing

6th-best month of the year

0.3

Beach & pool

6th-best month of the year

April is a reasonable time to visit Karlštejn for sightseeing.

What to pack for Karlštejn in April

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

In April, Karlštejn sees daytime highs around 14°C and nights near 4°C. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

UV index in Karlštejn 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 Karlštejn peaks around June 21 at about 7 (very 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 7 months of the year.

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

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

Air quality in Karlštejn 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 Karlštejn is worst in April — around 22 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)	17	18	21	22	19	21	18	19	19	17	16	15
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	17	Moderate
Feb	18	Moderate
Mar	21	Moderate
Apr	22	Moderate
May	19	Moderate
Jun	21	Moderate
Jul	18	Moderate
Aug	19	Moderate
Sep	19	Moderate
Oct	17	Moderate
Nov	16	Moderate
Dec	15	Moderate

Location & terrain

Where is Karlštejn?

Karlštejn sits at 49.9°N, 14.2°E, 0 m above sea level, in Czechia. The nearest listed city is Beroun, 9.0 km away.

Topography around Karlštejn

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

Within 3 km, the terrain around Karlštejn has only modest variations in elevation — a maximum elevation change of 237 m around an average of 323 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 474 m; within 80 km, large variations in elevation — a maximum elevation change of 829 m.

The land around Karlštejn is covered by trees (52%), cropland (22%) and grassland (20%) within 3 km, trees (48%) and cropland (28%) within 16 km, and cropland (43%) and trees (39%) within 80 km.

3 km

237 m

trees 52%

16 km

474 m

trees 48%

80 km

829 m

cropland 43%

treesgrasslandcroplandartificial surfaceswater

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

April weather nearby: Beroun 9.0 km · Stodůlky 16 km · Řepy 17 km · Modřany 18 km · Košíře 19 km · Hlubočepy 19 km · Braník 20 km · Smíchov 22 km

Czechia travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / E; 230 V · 50 Hz
Prices: ≈ 59% of US; price level, 2025
GDP per capita: $35,917; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 0.8; per 100k, 2023
Road deaths: 5.9; per 100k/yr, 2019
Income group: High; World Bank
English: High; EF EPI 582
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 Karlštejn (49.9374°, 14.186°, elevation 0 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	11	2
2	12	3
3	12	3
4	12	3
5	12	3
6	12	3
7	12	3
8	12	3
9	12	3
10	13	3
11	13	3
12	13	4
13	13	4
14	13	4
15	14	4
16	14	4
17	14	4
18	14	5
19	15	5
20	15	5
21	15	5
22	15	5
23	16	6
24	16	6
25	16	6
26	16	6
27	17	6
28	17	7
29	17	7
30	17	7

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	36	64
10	35	65
11	36	64
12	37	63
13	39	61
14	40	60
15	41	59
16	43	57
17	43	57
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	47	53
24	47	53
25	46	54
26	45	55
27	44	56
28	43	57
29	43	57
30	41	59

	Rain chance (%)	Snow chance (%)
1	33	5
2	33	5
3	32	5
4	32	5
5	33	5
6	33	5
7	33	5
8	34	4
9	34	4
10	34	4
11	34	4
12	34	4
13	34	3
14	34	3
15	34	3
16	34	3
17	34	3
18	34	2
19	34	2
20	34	2
21	34	1
22	34	1
23	34	1
24	34	1
25	35	0
26	35	0
27	36	0
28	37	0
29	38	0
30	38	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	100	0
28	100	0
29	99	1
30	99	1

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

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	36	64
10	35	65
11	36	64
12	37	63
13	39	61
14	40	60
15	41	59
16	43	57
17	43	57
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	47	53
24	47	53
25	46	54
26	45	55
27	44	56
28	43	57
29	43	57
30	41	59

	Rain chance (%)	Snow chance (%)
1	33	5
2	33	5
3	32	5
4	32	5
5	33	5
6	33	5
7	33	5
8	34	4
9	34	4
10	34	4
11	34	4
12	34	4
13	34	3
14	34	3
15	34	3
16	34	3
17	34	3
18	34	2
19	34	2
20	34	2
21	34	1
22	34	1
23	34	1
24	34	1
25	35	0
26	35	0
27	36	0
28	37	0
29	38	0
30	38	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	100	0
28	100	0
29	99	1
30	99	1

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

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	36	64
10	35	65
11	36	64
12	37	63
13	39	61
14	40	60
15	41	59
16	43	57
17	43	57
18	45	55
19	45	55
20	46	54
21	46	54
22	47	53
23	47	53
24	47	53
25	46	54
26	45	55
27	44	56
28	43	57
29	43	57
30	41	59

	Rain chance (%)	Snow chance (%)
1	33	5
2	33	5
3	32	5
4	32	5
5	33	5
6	33	5
7	33	5
8	34	4
9	34	4
10	34	4
11	34	4
12	34	4
13	34	3
14	34	3
15	34	3
16	34	3
17	34	3
18	34	2
19	34	2
20	34	2
21	34	1
22	34	1
23	34	1
24	34	1
25	35	0
26	35	0
27	36	0
28	37	0
29	38	0
30	38	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	100	0
28	100	0
29	99	1
30	99	1