Miercurea-Ciuc weather in September

In September, Miercurea-Ciuc sees average daytime highs of 18°C and overnight lows near 8°C, with 57 mm of precipitation across 9.2 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 16°C by the end. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Miercurea-Ciuc's 3rd-clearest and 5th-windiest month. For the whole year in context, see Miercurea-Ciuc's year-round climate.

Daytime high: 18°; 4th warmest
Overnight low: 8°; 9th coldest
Precipitation: 57 mm; 9.2 wet days
Daylight: 12 h 18 min; 6:01 AM – 6:21 PM
Cloud cover: 57%; 3rd clearest
Wind: 7 km/h; 5th windiest
Solar energy: 3.69 kWh/m²
Travel score: 5.8; out of 10

Miercurea-Ciuc is locality in Harghita County, Romania.

Air quality: Excellent; PM10 14.9 µg/m³ · 2019
Founded: 1427

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

← August Miercurea-Ciuc year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 16°C by the end.

A typical September day in Miercurea-Ciuc reaches about 18°C in the afternoon and slips back to 8°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 24°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

	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)	21	20	20	20	20	20	19	19	19	19	19	19	18	18	18	18	18	18	17	17	17	17	17	17	16	16	16	16	16	15
Avg low (°C)	10	10	9	9	9	9	9	9	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	6	6	6	6	6	6

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

How September really feels in Miercurea-Ciuc

Once humidity and wind are folded in, September 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

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

Miercurea-Ciuc weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-1° / -8°	30	7.9	8.3	8.8	0.0
Feb	1° / -7°	30	7.3	6.8	10	0.0
Mar	6° / -3°	44	10	6.6	11.6	0.5
Apr	12° / 2°	68	13	2.5	13.3	3.0
May	17° / 7°	92	15.8	0.3	14.7	4.8
Jun	21° / 11°	112	16.5	0	15.5	5.4
Jul	23° / 12°	103	15.7	0	15.2	6.0
Aug	23° / 12°	77	12	0	14	6.6
Sep	18° / 8°	57	9.2	0.1	12.4	5.8
Oct	12° / 3°	45	7.9	1.2	10.7	3.5
Nov	6° / -1°	34	7.3	4.2	9.2	0.6
Dec	-0° / -6°	36	7.7	6.8	8.5	0.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 52%.

	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 (%)	52	52	51	51	51	51	49	50	49	49	49	49	49	48	48	49	49	49	46	46	46	46	46	46	47	45	45	46	46	46
Cloudier (%)	48	48	49	49	49	49	51	50	51	51	51	51	51	52	52	51	51	51	54	54	54	54	54	54	53	55	55	54	54	54

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

Chance of precipitation in September

Any precipitation

Miercurea-Ciuc gets around 57 mm of rain and snow over 9.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 31% and peaks near 37% on the wettest days, and about 0 day brings snow. The odds ease 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
Rain chance (%)	37	37	36	36	35	34	34	33	32	32	31	31	31	30	30	30	29	29	29	29	29	29	28	28	28	28	27	27	27	27

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 93% 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 (%)	80	83	85	87	89	90	91	92	93	94	94	95	95	95	95	96	96	96	96	96	96	96	96	96	96	96	97	97	97	97
Comfortable (%)	19	17	15	13	11	10	9	8	7	6	6	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	3	3	3	3
Humid (%)	1	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	0

	Dry (%)	Comfortable (%)	Humid (%)
1	80	19	1
2	83	17	0
3	85	15	0
4	87	13	0
5	89	11	0
6	90	10	0
7	91	9	0
8	92	8	0
9	93	7	0
10	94	6	0
11	94	6	0
12	95	5	0
13	95	5	0
14	95	5	0
15	95	5	0
16	96	4	0
17	96	4	0
18	96	4	0
19	96	4	0
20	96	4	0
21	96	4	0
22	96	4	0
23	96	4	0
24	96	4	0
25	96	4	0
26	96	4	0
27	97	3	0
28	97	3	0
29	97	3	0
30	97	3	0

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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)	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	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

	Wind speed (km/h)	Feels
1	7	calm
2	7	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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over September. Sunrise moves from 5:42 AM to 6:20 AM, and sunset from 6:51 PM to 5:52 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)	13.2	13.1	13.0	13.0	12.9	12.9	12.8	12.8	12.7	12.7	12.6	12.5	12.5	12.4	12.4	12.3	12.3	12.2	12.2	12.1	12.0	12.0	11.9	11.9	11.8	11.8	11.7	11.6	11.6	11.5
Sunrise (AM)	5:42	5:43	5:44	5:46	5:47	5:48	5:50	5:51	5:52	5:54	5:55	5:56	5:57	5:59	6:00	6:01	6:03	6:04	6:05	6:07	6:08	6:09	6:11	6:12	6:13	6:15	6:16	6:17	6:19	6:20
Sunset (PM)	6:51	6:49	6:47	6:45	6:43	6:41	6:39	6:37	6:35	6:33	6:31	6:29	6:27	6:25	6:23	6:21	6:19	6:17	6:15	6:13	6:11	6:08	6:06	6:04	6:02	6:00	5:58	5:56	5:54	5:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.2	5:42	6:51
2	13.1	5:43	6:49
3	13.0	5:44	6:47
4	13.0	5:46	6:45
5	12.9	5:47	6:43
6	12.9	5:48	6:41
7	12.8	5:50	6:39
8	12.8	5:51	6:37
9	12.7	5:52	6:35
10	12.7	5:54	6:33
11	12.6	5:55	6:31
12	12.5	5:56	6:29
13	12.5	5:57	6:27
14	12.4	5:59	6:25
15	12.4	6:00	6:23
16	12.3	6:01	6:21
17	12.3	6:03	6:19
18	12.2	6:04	6:17
19	12.2	6:05	6:15
20	12.1	6:07	6:13
21	12.0	6:08	6:11
22	12.0	6:09	6:08
23	11.9	6:11	6:06
24	11.9	6:12	6:04
25	11.8	6:13	6:02
26	11.8	6:15	6:00
27	11.7	6:16	5:58
28	11.6	6:17	5:56
29	11.6	6:19	5:54
30	11.5	6:20	5:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.69 kWh/m².

For context, solar energy here swings from a low near 1.15 kWh/m² to a high of 5.7 kWh/m² in June across the year — September's 3.69 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)	4.4	4.3	4.3	4.2	4.2	4.2	4.1	4.1	4.0	4.0	3.9	3.9	3.8	3.8	3.7	3.7	3.6	3.6	3.5	3.5	3.4	3.4	3.4	3.3	3.3	3.2	3.2	3.1	3.1	3.1
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.3	Bright
3	4.3	Bright
4	4.2	Bright
5	4.2	Bright
6	4.2	Bright
7	4.1	Bright
8	4.1	Bright
9	4.0	Bright
10	4.0	Moderate
11	3.9	Moderate
12	3.9	Moderate
13	3.8	Moderate
14	3.8	Moderate
15	3.7	Moderate
16	3.7	Moderate
17	3.6	Moderate
18	3.6	Moderate
19	3.5	Moderate
20	3.5	Moderate
21	3.4	Moderate
22	3.4	Moderate
23	3.4	Moderate
24	3.3	Moderate
25	3.3	Moderate
26	3.2	Moderate
27	3.2	Moderate
28	3.1	Moderate
29	3.1	Moderate
30	3.1	Moderate

Planning a trip in September

Hazard calendar for Miercurea-Ciuc

In seasonPeak

In September, Miercurea-Ciuc sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Miercurea-Ciuc's rainy season runs April–September, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Miercurea-Ciuc?

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

5.8

Sightseeing

3rd-best month of the year

2.0

Beach & pool

4th-best month of the year

September is a reasonable time to visit Miercurea-Ciuc for sightseeing.

What to pack for Miercurea-Ciuc in September

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

In September, Miercurea-Ciuc sees daytime highs around 18°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

UV index in Miercurea-Ciuc in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Miercurea-Ciuc peaks around July 17 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	4	7	6	8	8	8	6	3	2	1
Level	Low	Low	Moderate	Very high	High	Very high	Very high	Very high	High	Moderate	Low	Low

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

Location & terrain

Where is Miercurea-Ciuc?

Miercurea-Ciuc sits at 46.4°N, 25.8°E, 653 m above sea level, in Romania. The nearest listed city is Odorheiu Secuiesc, 39 km away.

Topography around Miercurea-Ciuc

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

Within 3 km, the terrain around Miercurea-Ciuc has only modest variations in elevation — a maximum elevation change of 249 m around an average of 692 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,118 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,694 m.

The land around Miercurea-Ciuc is covered by cropland (42%) and grassland (29%) within 3 km, trees (47%), grassland (26%) and cropland (25%) within 16 km, and trees (61%) and grassland (25%) within 80 km.

3 km

249 m

cropland 42%

16 km

1,118 m

trees 47%

80 km

1,694 m

trees 61%

treesgrasslandcroplandartificial surfaces

← August Miercurea-Ciuc year-round climate October →Best places to visit in September

September weather nearby: Odorheiu Secuiesc 39 km · Gheorgheni 44 km · Târgu Secuiesc 47 km · Comăneşti 49 km · Sfântu Gheorghe 54 km · Moineşti 55 km · Piatra Neamţ 75 km · Codlea 77 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 Miercurea-Ciuc (46.35°, 25.8°, elevation 653 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	10
2	20	10
3	20	9
4	20	9
5	20	9
6	20	9
7	19	9
8	19	9
9	19	8
10	19	8
11	19	8
12	19	8
13	18	8
14	18	8
15	18	8
16	18	8
17	18	7
18	18	7
19	17	7
20	17	7
21	17	7
22	17	7
23	17	7
24	17	7
25	16	6
26	16	6
27	16	6
28	16	6
29	16	6
30	15	6

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

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

	Dry (%)	Comfortable (%)	Humid (%)
1	80	19	1
2	83	17	0
3	85	15	0
4	87	13	0
5	89	11	0
6	90	10	0
7	91	9	0
8	92	8	0
9	93	7	0
10	94	6	0
11	94	6	0
12	95	5	0
13	95	5	0
14	95	5	0
15	95	5	0
16	96	4	0
17	96	4	0
18	96	4	0
19	96	4	0
20	96	4	0
21	96	4	0
22	96	4	0
23	96	4	0
24	96	4	0
25	96	4	0
26	96	4	0
27	97	3	0
28	97	3	0
29	97	3	0
30	97	3	0

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

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

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

	Dry (%)	Comfortable (%)	Humid (%)
1	80	19	1
2	83	17	0
3	85	15	0
4	87	13	0
5	89	11	0
6	90	10	0
7	91	9	0
8	92	8	0
9	93	7	0
10	94	6	0
11	94	6	0
12	95	5	0
13	95	5	0
14	95	5	0
15	95	5	0
16	96	4	0
17	96	4	0
18	96	4	0
19	96	4	0
20	96	4	0
21	96	4	0
22	96	4	0
23	96	4	0
24	96	4	0
25	96	4	0
26	96	4	0
27	97	3	0
28	97	3	0
29	97	3	0
30	97	3	0

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

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

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

	Dry (%)	Comfortable (%)	Humid (%)
1	80	19	1
2	83	17	0
3	85	15	0
4	87	13	0
5	89	11	0
6	90	10	0
7	91	9	0
8	92	8	0
9	93	7	0
10	94	6	0
11	94	6	0
12	95	5	0
13	95	5	0
14	95	5	0
15	95	5	0
16	96	4	0
17	96	4	0
18	96	4	0
19	96	4	0
20	96	4	0
21	96	4	0
22	96	4	0
23	96	4	0
24	96	4	0
25	96	4	0
26	96	4	0
27	97	3	0
28	97	3	0
29	97	3	0
30	97	3	0