Blaj weather in May

In May, Blaj sees average daytime highs of 22°C and overnight lows near 10°C, with 71 mm of rain across 12.6 wet days and about 14.7 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 23°C by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of May to 15 h 18 min by month's end. Set against the rest of the year, May is Blaj's 7th-clearest and 4th-windiest month. For the whole year in context, see Blaj's year-round climate.

Daytime high: 22°; 5th warmest
Overnight low: 10°; 8th coldest
Rainfall: 71 mm; 12.6 wet days
Daylight: 14 h 48 min; 4:58 AM – 7:43 PM
Cloud cover: 60%; 7th clearest
Wind: 7 km/h; 4th windiest
Solar energy: 5.62 kWh/m²
Travel score: 6.3; out of 10

Blaj is locality in Alba County, Romania.

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

← April Blaj year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 23°C by the end.

A typical May day in Blaj reaches about 22°C in the afternoon and slips back to 10°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 28°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

	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	31
Avg high (°C)	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	22	22	22	22	22	23	23	23	23	23	23	23	23	23	24
Avg low (°C)	9	9	9	9	9	9	9	9	10	10	10	10	10	10	10	10	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12

	Avg high (°C)	Avg low (°C)
1	21	9
2	21	9
3	21	9
4	21	9
5	21	9
6	21	9
7	21	9
8	21	9
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	11
18	22	11
19	22	11
20	22	11
21	22	11
22	23	11
23	23	11
24	23	11
25	23	12
26	23	12
27	23	12
28	23	12
29	23	12
30	23	12
31	24	12

How May really feels in Blaj

Once humidity and wind are folded in, May 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

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

Blaj weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 3rd-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° / -5°	24	6.7	4.1	8.8	0.0
Feb	5° / -3°	23	6.2	3.7	10	0.3
Mar	11° / 1°	34	8	1.8	11.6	2.8
Apr	17° / 6°	51	9.8	0.5	13.3	5.4
May	22° / 10°	71	12.6	0	14.7	6.3
Jun	26° / 14°	84	12.1	0	15.5	6.4
Jul	28° / 16°	71	11.7	0	15.2	6.2
Aug	28° / 15°	53	8.3	0	14	6.5
Sep	23° / 11°	52	8	0	12.3	7.2
Oct	17° / 6°	42	7	0	10.7	5.7
Nov	9° / 1°	30	6.3	1.3	9.2	2.2
Dec	3° / -3°	30	6.9	3.1	8.5	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 21% of May, with mostly cloudy or overcast conditions the remaining 53%.

	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	31
Clearer (%)	53	52	51	51	51	50	49	49	49	48	47	46	46	46	45	45	44	44	44	43	43	43	45	45	45	45	46	46	48	48	49
Cloudier (%)	47	48	49	49	49	50	51	51	51	52	53	54	54	54	55	55	56	56	56	57	57	57	55	55	55	55	54	54	52	52	51

	Clearer (%)	Cloudier (%)
1	53	47
2	52	48
3	51	49
4	51	49
5	51	49
6	50	50
7	49	51
8	49	51
9	49	51
10	48	52
11	47	53
12	46	54
13	46	54
14	46	54
15	45	55
16	45	55
17	44	56
18	44	56
19	44	56
20	43	57
21	43	57
22	43	57
23	45	55
24	45	55
25	45	55
26	45	55
27	46	54
28	46	54
29	48	52
30	48	52
31	49	51

Chance of precipitation in May

Any precipitation

Blaj gets around 71 mm of rain over 12.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 46% on the wettest days. 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	31
Rain chance (%)	32	32	33	33	33	33	34	34	35	36	36	37	38	38	39	40	41	42	43	44	45	45	46	46	46	46	45	45	44	44	43

	Rain chance (%)
1	32
2	32
3	33
4	33
5	33
6	33
7	34
8	34
9	35
10	36
11	36
12	37
13	38
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	45
22	45
23	46
24	46
25	46
26	46
27	45
28	45
29	44
30	44
31	43

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 83% 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	31
Dry (%)	98	98	98	97	97	97	96	95	95	94	93	92	90	89	87	86	84	81	79	78	76	73	72	71	68	67	66	64	63	61	59
Comfortable (%)	2	2	2	3	3	3	4	5	5	6	7	8	10	11	13	14	16	18	20	21	23	25	26	27	29	30	30	31	32	33	34
Humid (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	2	2	2	3	3	4	5	5	6	7

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	97	3	0
5	97	3	0
6	97	3	0
7	96	4	0
8	95	5	0
9	95	5	0
10	94	6	0
11	93	7	0
12	92	8	0
13	90	10	0
14	89	11	0
15	87	13	0
16	86	14	0
17	84	16	0
18	81	18	1
19	79	20	1
20	78	21	1
21	76	23	1
22	73	25	2
23	72	26	2
24	71	27	2
25	68	29	3
26	67	30	3
27	66	30	4
28	64	31	5
29	63	32	5
30	61	33	6
31	59	34	7

Wind in May

Winds average 7 km/h in May.

Across May, 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	31
Wind speed (km/h)	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	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	calm

	Wind speed (km/h)	Feels
1	8	calm
2	8	calm
3	7	calm
4	7	calm
5	7	calm
6	7	calm
7	7	calm
8	7	calm
9	7	calm
10	7	calm
11	7	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	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
31	7	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 06 min at the start of May to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over May. Sunrise moves from 5:19 AM to 4:44 AM, and sunset from 7:24 PM to 8:00 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	31
Daylight (h)	14.1	14.1	14.2	14.2	14.3	14.3	14.4	14.4	14.5	14.5	14.5	14.6	14.6	14.7	14.7	14.8	14.8	14.8	14.9	14.9	14.9	15.0	15.0	15.1	15.1	15.1	15.2	15.2	15.2	15.2	15.3
Sunrise (AM)	5:19	5:17	5:16	5:14	5:13	5:11	5:10	5:08	5:07	5:06	5:04	5:03	5:02	5:00	4:59	4:58	4:57	4:56	4:54	4:53	4:52	4:51	4:50	4:49	4:48	4:48	4:47	4:46	4:45	4:44	4:44
Sunset (PM)	7:24	7:25	7:27	7:28	7:29	7:31	7:32	7:33	7:35	7:36	7:37	7:38	7:40	7:41	7:42	7:43	7:45	7:46	7:47	7:48	7:49	7:50	7:51	7:53	7:54	7:55	7:56	7:57	7:58	7:59	8:00

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.1	5:19	7:24
2	14.1	5:17	7:25
3	14.2	5:16	7:27
4	14.2	5:14	7:28
5	14.3	5:13	7:29
6	14.3	5:11	7:31
7	14.4	5:10	7:32
8	14.4	5:08	7:33
9	14.5	5:07	7:35
10	14.5	5:06	7:36
11	14.5	5:04	7:37
12	14.6	5:03	7:38
13	14.6	5:02	7:40
14	14.7	5:00	7:41
15	14.7	4:59	7:42
16	14.8	4:58	7:43
17	14.8	4:57	7:45
18	14.8	4:56	7:46
19	14.9	4:54	7:47
20	14.9	4:53	7:48
21	14.9	4:52	7:49
22	15.0	4:51	7:50
23	15.0	4:50	7:51
24	15.1	4:49	7:53
25	15.1	4:48	7:54
26	15.1	4:48	7:55
27	15.2	4:47	7:56
28	15.2	4:46	7:57
29	15.2	4:45	7:58
30	15.2	4:44	7:59
31	15.3	4:44	8:00

Solar energy in May

Daily solar energy (kWh/m²)

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

For context, solar energy here swings from a low near 1.14 kWh/m² to a high of 5.98 kWh/m² in June across the year — May's 5.62 kWh/m² sits near the top of that range.

	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	31
Solar energy (kWh/m²)	5.5	5.5	5.5	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.8
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	Bright

	Solar energy (kWh/m²)	Level
1	5.5	Bright
2	5.5	Bright
3	5.5	Bright
4	5.6	Bright
5	5.6	Bright
6	5.6	Bright
7	5.6	Bright
8	5.6	Bright
9	5.6	Bright
10	5.6	Bright
11	5.6	Bright
12	5.6	Bright
13	5.6	Bright
14	5.6	Bright
15	5.6	Bright
16	5.6	Bright
17	5.6	Bright
18	5.6	Bright
19	5.6	Bright
20	5.6	Bright
21	5.6	Bright
22	5.6	Bright
23	5.6	Bright
24	5.7	Bright
25	5.7	Bright
26	5.7	Bright
27	5.7	Bright
28	5.8	Bright
29	5.8	Bright
30	5.8	Bright
31	5.8	Bright

Planning a trip in May

Is May a good time to visit Blaj?

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

6.3

Sightseeing

4th-best month of the year

4.4

Beach & pool

5th-best month of the year

May is a reasonable time to visit Blaj for sightseeing.

What to pack for Blaj in May

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

In May, Blaj sees daytime highs around 22°C and nights near 10°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Blaj in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Blaj peaks around July 16 at about 8 (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 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	3	7	6	8	8	8	5	3	2	1
Level	Low	Low	Moderate	Very high	High	Very high	Very high	Very high	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Low
Mar	3	Moderate
Apr	7	Very high
May	6	High
Jun	8	Very high
Jul	8	Very high
Aug	8	Very high
Sep	5	Moderate
Oct	3	Moderate
Nov	2	Low
Dec	1	Low

Location & terrain

Where is Blaj?

Blaj sits at 46.2°N, 23.9°E, 246 m above sea level, in Romania. The nearest listed city is Aiud, 21 km away.

Topography around Blaj

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

Within 3 km, the terrain around Blaj has only modest variations in elevation — a maximum elevation change of 242 m around an average of 296 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 324 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,196 m.

The land around Blaj is covered by cropland (37%), grassland (29%) and trees (21%) within 3 km, cropland (42%) and grassland (39%) within 16 km, and trees (45%), grassland (31%) and cropland (22%) within 80 km.

3 km

242 m

cropland 37%

16 km

324 m

cropland 42%

80 km

2,196 m

trees 45%

treesgrasslandcroplandartificial surfaceswater

← April Blaj year-round climate June →Best places to visit in May

May weather nearby: Aiud 21 km · Ocna Mureş 24 km · Alba Iulia 28 km · Mediaş 33 km · Târnăveni 34 km · Sebeş 36 km · Luduş 37 km · Câmpia Turzii 42 km

Romania travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 44% of US; price level, 2025
GDP per capita: $22,538; 2025
Happiness: 6.6 / 10; World Happiness, 2025
Safe drinking water: 82%; of population, 2024
Homicide rate: 1.1; per 100k, 2023
Road deaths: 10.3; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 605
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 Blaj (46.1751°, 23.9158°, elevation 246 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	21	9
2	21	9
3	21	9
4	21	9
5	21	9
6	21	9
7	21	9
8	21	9
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	11
18	22	11
19	22	11
20	22	11
21	22	11
22	23	11
23	23	11
24	23	11
25	23	12
26	23	12
27	23	12
28	23	12
29	23	12
30	23	12
31	24	12

	Clearer (%)	Cloudier (%)
1	53	47
2	52	48
3	51	49
4	51	49
5	51	49
6	50	50
7	49	51
8	49	51
9	49	51
10	48	52
11	47	53
12	46	54
13	46	54
14	46	54
15	45	55
16	45	55
17	44	56
18	44	56
19	44	56
20	43	57
21	43	57
22	43	57
23	45	55
24	45	55
25	45	55
26	45	55
27	46	54
28	46	54
29	48	52
30	48	52
31	49	51

	Rain chance (%)
1	32
2	32
3	33
4	33
5	33
6	33
7	34
8	34
9	35
10	36
11	36
12	37
13	38
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	45
22	45
23	46
24	46
25	46
26	46
27	45
28	45
29	44
30	44
31	43

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	97	3	0
5	97	3	0
6	97	3	0
7	96	4	0
8	95	5	0
9	95	5	0
10	94	6	0
11	93	7	0
12	92	8	0
13	90	10	0
14	89	11	0
15	87	13	0
16	86	14	0
17	84	16	0
18	81	18	1
19	79	20	1
20	78	21	1
21	76	23	1
22	73	25	2
23	72	26	2
24	71	27	2
25	68	29	3
26	67	30	3
27	66	30	4
28	64	31	5
29	63	32	5
30	61	33	6
31	59	34	7

	Avg high (°C)	Avg low (°C)
1	21	9
2	21	9
3	21	9
4	21	9
5	21	9
6	21	9
7	21	9
8	21	9
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	11
18	22	11
19	22	11
20	22	11
21	22	11
22	23	11
23	23	11
24	23	11
25	23	12
26	23	12
27	23	12
28	23	12
29	23	12
30	23	12
31	24	12

	Clearer (%)	Cloudier (%)
1	53	47
2	52	48
3	51	49
4	51	49
5	51	49
6	50	50
7	49	51
8	49	51
9	49	51
10	48	52
11	47	53
12	46	54
13	46	54
14	46	54
15	45	55
16	45	55
17	44	56
18	44	56
19	44	56
20	43	57
21	43	57
22	43	57
23	45	55
24	45	55
25	45	55
26	45	55
27	46	54
28	46	54
29	48	52
30	48	52
31	49	51

	Rain chance (%)
1	32
2	32
3	33
4	33
5	33
6	33
7	34
8	34
9	35
10	36
11	36
12	37
13	38
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	45
22	45
23	46
24	46
25	46
26	46
27	45
28	45
29	44
30	44
31	43

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	97	3	0
5	97	3	0
6	97	3	0
7	96	4	0
8	95	5	0
9	95	5	0
10	94	6	0
11	93	7	0
12	92	8	0
13	90	10	0
14	89	11	0
15	87	13	0
16	86	14	0
17	84	16	0
18	81	18	1
19	79	20	1
20	78	21	1
21	76	23	1
22	73	25	2
23	72	26	2
24	71	27	2
25	68	29	3
26	67	30	3
27	66	30	4
28	64	31	5
29	63	32	5
30	61	33	6
31	59	34	7

	Avg high (°C)	Avg low (°C)
1	21	9
2	21	9
3	21	9
4	21	9
5	21	9
6	21	9
7	21	9
8	21	9
9	22	10
10	22	10
11	22	10
12	22	10
13	22	10
14	22	10
15	22	10
16	22	10
17	22	11
18	22	11
19	22	11
20	22	11
21	22	11
22	23	11
23	23	11
24	23	11
25	23	12
26	23	12
27	23	12
28	23	12
29	23	12
30	23	12
31	24	12

	Clearer (%)	Cloudier (%)
1	53	47
2	52	48
3	51	49
4	51	49
5	51	49
6	50	50
7	49	51
8	49	51
9	49	51
10	48	52
11	47	53
12	46	54
13	46	54
14	46	54
15	45	55
16	45	55
17	44	56
18	44	56
19	44	56
20	43	57
21	43	57
22	43	57
23	45	55
24	45	55
25	45	55
26	45	55
27	46	54
28	46	54
29	48	52
30	48	52
31	49	51

	Rain chance (%)
1	32
2	32
3	33
4	33
5	33
6	33
7	34
8	34
9	35
10	36
11	36
12	37
13	38
14	38
15	39
16	40
17	41
18	42
19	43
20	44
21	45
22	45
23	46
24	46
25	46
26	46
27	45
28	45
29	44
30	44
31	43

	Dry (%)	Comfortable (%)	Humid (%)
1	98	2	0
2	98	2	0
3	98	2	0
4	97	3	0
5	97	3	0
6	97	3	0
7	96	4	0
8	95	5	0
9	95	5	0
10	94	6	0
11	93	7	0
12	92	8	0
13	90	10	0
14	89	11	0
15	87	13	0
16	86	14	0
17	84	16	0
18	81	18	1
19	79	20	1
20	78	21	1
21	76	23	1
22	73	25	2
23	72	26	2
24	71	27	2
25	68	29	3
26	67	30	3
27	66	30	4
28	64	31	5
29	63	32	5
30	61	33	6
31	59	34	7