Kohtla-Järve weather in September

In September, Kohtla-Järve sees average daytime highs of 15°C and overnight lows near 10°C, with 57 mm of rain across 12.5 wet days and about 12.6 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 13°C by the end. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of September to 11 h 18 min by month's end. Set against the rest of the year, September is Kohtla-Järve's 7th-clearest and 6th-windiest month. For the whole year in context, see Kohtla-Järve's year-round climate.

Daytime high
15°
4th warmest
Overnight low
10°
9th coldest
Rainfall
57 mm
12.5 wet days
Daylight
12 h 30 min
5:50 AM – 6:21 PM
Cloud cover
69%
7th clearest
Wind
16 km/h
6th windiest
Solar energy
2.5 kWh/m²
Travel score
4.2
out of 10

Kohtla-Järve is town in Estonia.

Air quality
Excellent
PM2.5 4 µg/m³ · 2019
Density
900/km²
people per km²
Founded
1946

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 17°C in the first days to 13°C by the end.

A typical September day in Kohtla-Järve reaches about 15°C in the afternoon and slips back to 10°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 19°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11812
21812
31711
41711
51711
61711
71711
81711
91611
101610
111610
121610
131610
141510
151510
16159
17159
18159
19149
20149
21149
22149
23148
24148
25138
26138
27138
28138
29138
30127

How September really feels in Kohtla-Järve

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
0
heat index over the day's high
Days feeling ≤ C
0
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.

Kohtla-Järve weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -6°3910.510.26.60.0
Feb-2° / -7°328.88.68.70.0
Mar / -4°338.7611.30.0
Apr / 369.32.414.11.2
May14° / 488.90.116.64.0
Jun18° / 10°7511.7018.15.4
Jul21° / 14°6411.2017.56.3
Aug20° / 13°7513.1015.35.8
Sep15° / 10°5712.5012.64.2
Oct / 6513.11.49.81.4
Nov / 5312.15.87.30.0
Dec / -3°4511.88.95.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23565
33565
43565
53664
63565
73664
83664
93664
103565
113565
123565
133565
143466
153466
163466
173367
183466
193367
203367
213367
223268
233268
243169
253169
263169
273070
282971
292971
302971

Chance of precipitation in September

Any precipitation

Kohtla-Järve gets around 57 mm of rain over 12.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
241
341
441
542
642
742
842
943
1043
1144
1244
1344
1444
1544
1644
1744
1843
1943
2042
2142
2242
2341
2441
2541
2641
2741
2841
2941
3041

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 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
172262
273252
376231
477221
579201
680191
782171
883161
984151
1087130
1188120
1289110
1390100
149190
159280
169370
179460
189550
199550
209640
219730
229730
239730
249820
259820
269820
279820
289910
299910
309910

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 54 min at the start of September to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 156 minutes over September. Sunrise moves from 5:14 AM to 6:23 AM, and sunset from 7:07 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:147:07
213.85:177:04
313.75:197:01
413.65:216:58
513.55:246:55
613.45:266:52
713.35:286:49
813.25:316:46
913.25:336:43
1013.15:356:39
1113.05:386:36
1212.95:406:33
1312.85:426:30
1412.75:456:27
1512.65:476:24
1612.55:506:21
1712.45:526:18
1812.35:546:15
1912.35:576:12
2012.25:596:09
2112.16:016:05
2212.06:046:02
2311.96:065:59
2411.86:085:56
2511.76:115:53
2611.66:135:50
2711.56:165:47
2811.46:185:44
2911.36:205:41
3011.36:235:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.5 kWh/m².

For context, solar energy here swings from a low near 0.18 kWh/m² to a high of 5.66 kWh/m² in June across the year — September's 2.5 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.3Moderate
23.2Moderate
33.1Moderate
43.1Moderate
53.0Moderate
63.0Moderate
72.9Moderate
82.9Moderate
92.8Moderate
102.8Moderate
112.7Moderate
122.7Moderate
132.6Moderate
142.6Moderate
152.5Moderate
162.5Moderate
172.4Moderate
182.4Moderate
192.3Moderate
202.3Moderate
212.2Moderate
222.2Moderate
232.1Moderate
242.1Moderate
252.0Moderate
262.0Moderate
271.9Dim
281.9Dim
291.8Dim
301.8Dim
Planning a trip in September

Is September a good time to visit Kohtla-Järve?

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

4.2
Sightseeing
4th-best month of the year
0.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Kohtla-Järve for sightseeing.

What to pack for Kohtla-Järve in September

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

In September, Kohtla-Järve sees daytime highs around 15°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Kohtla-Järve in September

The nearest coast averages about 15°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 26 km away) is warmest in August at about 18°C and coldest in February near 0°C.

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

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr2Bracing
May7Bracing
Jun12Bracing
Jul17Cool
Aug18Cool
Sep15Bracing
Oct11Bracing
Nov7Bracing
Dec4Bracing

UV index in Kohtla-Järve in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kohtla-Järve peaks around June 21 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 19 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 21UV 5Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May4Moderate
Jun5High
Jul5High
Aug5Moderate
Sep3Moderate
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Kohtla-Järve?

Kohtla-Järve sits at 59.4°N, 27.3°E, 66 m above sea level, in Estonia. The nearest listed city is Narva, 52 km away.

NarvaRakvereSlantsyTartu

Topography around Kohtla-Järve

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

Within 3 km, the terrain around Kohtla-Järve has only modest variations in elevation — a maximum elevation change of 111 m around an average of 65 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 161 m; within 80 km, only modest variations in elevation — a maximum elevation change of 188 m.

The land around Kohtla-Järve is covered by trees (34%), cropland (29%) and grassland (21%) within 3 km, trees (34%) and water (33%) within 16 km, and water (46%) and trees (38%) within 80 km.

3 km
111 m
16 km
161 m
80 km
188 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Narva 52 km · Rakvere 52 km · Slantsy 56 km · Kingisepp 76 km · Sosnovyy Bor 116 km · Tartu 117 km · Kotka 120 km · Karhula 126 km

Estonia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$34,418
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
1.5
per 100k, 2023
Road deaths
4.5
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 561
Religion
none 58%Orthodox 17%Protestant 9%other 3%

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 Kohtla-Järve (59.3986°, 27.2731°, elevation 66 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).