Jelgava weather in September

In September, Jelgava sees average daytime highs of 17°C and overnight lows near 9°C, with 53 mm of rain across 10.1 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 14°C by the end. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 42 min at the start of September to 11 h 18 min by month's end. Set against the rest of the year, September is Jelgava's 6th-clearest and 7th-windiest month. For the whole year in context, see Jelgava's year-round climate.

Daytime high
17°
4th warmest
Overnight low
9th coldest
Rainfall
53 mm
10.1 wet days
Daylight
12 h 30 min
6:05 AM – 6:34 PM
Cloud cover
67%
6th clearest
Wind
13 km/h
7th windiest
Solar energy
2.74 kWh/m²
Travel score
5.2
out of 10

Jelgava is state city in central Latvia.

Density
905/km²
people per km²
Founded
1226

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 19°C in the first days to 14°C by the end.

A typical September day in Jelgava reaches about 17°C in the afternoon and slips back to 9°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 21°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12011
21911
31911
41911
51911
61911
71910
81810
91810
101810
111810
121810
131710
14179
15179
16179
17179
18169
19169
20169
21168
22168
23168
24158
25158
26158
27158
28158
29147
30147

How September really feels in Jelgava

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.

Jelgava 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -5°389.76.77.20.0
Feb / -5°348.86.49.10.0
Mar / -2°359.54.311.40.2
Apr11° / 419.51.313.92.8
May17° / 5510.8016.15.3
Jun20° / 11°7311.7017.46.0
Jul23° / 14°7412.5016.96.4
Aug22° / 13°6612.1014.96.3
Sep17° / 5310.1012.55.2
Oct10° / 5911.40.6102.3
Nov / 4610.93.17.80.2
Dec / -2°39106.36.60.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13763
23763
33763
43763
53862
63862
73961
83862
93862
103862
113862
123763
133763
143763
153664
163664
173664
183664
193664
203664
213565
223664
233664
243664
253565
263565
273466
283466
293367
303367

Chance of precipitation in September

Any precipitation

Jelgava gets around 53 mm of rain over 10.1 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 34% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
337
437
537
636
736
836
936
1035
1135
1235
1334
1434
1533
1633
1732
1832
1932
2031
2131
2231
2331
2431
2532
2632
2732
2833
2933
3033

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 87% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
171272
272262
373252
475232
576222
678211
779201
881181
982171
1083161
1184151
1286131
1387121
1488111
1589101
169091
179181
189181
199370
209370
219460
229460
239460
249550
259550
269550
279640
289640
299640
309730

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112calm
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 42 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 144 minutes over September. Sunrise moves from 5:34 AM to 6:35 AM, and sunset from 7:15 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:347:15
213.65:367:13
313.55:387:10
413.45:417:07
513.45:437:04
613.35:457:02
713.25:476:59
813.15:496:56
913.05:516:53
1013.05:536:50
1112.95:556:48
1212.85:576:45
1312.75:596:42
1412.66:016:39
1512.66:036:36
1612.56:056:34
1712.46:076:31
1812.36:106:28
1912.26:126:25
2012.16:146:22
2112.16:166:19
2212.06:186:17
2311.96:206:14
2411.86:226:11
2511.76:246:08
2611.76:266:05
2711.66:286:03
2811.56:306:00
2911.46:335:57
3011.36:355:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.74 kWh/m².

For context, solar energy here swings from a low near 0.3 kWh/m² to a high of 5.7 kWh/m² in June across the year — September's 2.74 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.4Moderate
33.4Moderate
43.3Moderate
53.3Moderate
63.2Moderate
73.2Moderate
83.1Moderate
93.1Moderate
103.0Moderate
113.0Moderate
122.9Moderate
132.9Moderate
142.8Moderate
152.8Moderate
162.7Moderate
172.7Moderate
182.6Moderate
192.6Moderate
202.5Moderate
212.5Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.3Moderate
262.3Moderate
272.2Moderate
282.2Moderate
292.1Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Jelgava?

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

5.2
Sightseeing
5th-best month of the year
1.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Jelgava for sightseeing.

What to pack for Jelgava in September

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

In September, Jelgava sees daytime highs around 17°C and nights near 9°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Jelgava in September

The nearest coast averages about 16°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 53 km away) is warmest in August at about 19°C and coldest in March near 1°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
Jan2Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May8Bracing
Jun14Bracing
Jul18Cool
Aug19Cool
Sep16Cool
Oct11Bracing
Nov8Bracing
Dec5Bracing

UV index in Jelgava in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jelgava peaks around June 19 at about 6 (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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 19UV 6Dec 19UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Low
Apr3Moderate
May5Moderate
Jun6High
Jul5High
Aug5High
Sep3Moderate
Oct1Low
Nov1Low
Dec0Low

Air quality in Jelgava in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Jelgava is worst in June — around 18 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (November, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 918 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar15Moderate
Apr17Moderate
May18Moderate
Jun18Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov7Good
Dec8Good
Location & terrain

Where is Jelgava?

Jelgava sits at 56.6°N, 23.7°E, 5 m above sea level, in Latvia. The nearest listed city is Mārupe, 35 km away.

MārupeJūrmalaRigaDārzciemsSalaspilsTukumsOgreŠiauliai

Topography around Jelgava

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

Within 3 km, the terrain around Jelgava has only modest variations in elevation — a maximum elevation change of 31 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 74 m; within 80 km, only modest variations in elevation — a maximum elevation change of 186 m.

The land around Jelgava is covered by grassland (46%), artificial surfaces (24%) and trees (23%) within 3 km, trees (42%), cropland (32%) and grassland (21%) within 16 km, and trees (40%) and cropland (35%) within 80 km.

3 km
31 m
16 km
74 m
80 km
186 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Mārupe 35 km · Jūrmala 36 km · Riga 41 km · Dārzciems 43 km · Salaspils 46 km · Tukums 49 km · Ogre 58 km · Šiauliai 83 km

Latvia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$26,312
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2.5
per 100k, 2023
Road deaths
8.1
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 599
Religion
Lutheran 36%unspecified/none 24%Roman Catholic 20%Orthodox 19%

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 Jelgava (56.65°, 23.7128°, elevation 5 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. 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).