What are the differences in sun/precipitation levels between Suwon, Ulsan, Tongjin, Goyang and Gwangju?

Goyang experiences the highest total sun hours in May, reaching 8.6 hours, while Ulsan has a notable dip in sunshine during September with only 3.7 hours of sun. Precipitation levels are significantly higher in Goyang during the summer months, particularly in July and August, with over 10 mm of rainfall, compared to Gwangju and Ulsan, which also see high precipitation but slightly lower values. Overall, while all cities experience seasonal variation in sun hours and precipitation, Goyang stands out for its pronounced summer rainfall contrasted with its higher sunshine hours earlier in the year.

What are the differences in astronomy conditions (sunrise, sunset) between Suwon, Ulsan, Tongjin, Goyang and Gwangju?

Ulsan has the earliest sunrise and sunset times throughout the year compared to the other cities. Goyang and Tongjin share the identical earliest sunrise time while Goyang also has latest overall sunset time. Gwangju experiences the shortest longest day, indicating a slightly smaller range in daylight hours. The latest sunrise occurs in January across all locations, while the earliest sunsets are in December, consistent with seasonal patterns, which also shows that day lenght is shortest in December and longest in June.

Suwon, Ulsan, Tongjin, Goyang and 1 more: Weather & Climate Comparison

Yearly weather

Calculations are based on the last 8 years of historical weather data.

Temperatures

Maximum Temperatures

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	2.3°C	6.2°C	2.3°C	2.0°C	5.1°C
Feb	5.0°C	8.0°C	5.0°C	4.8°C	7.5°C
Mar	12.1°C	13.3°C	12.1°C	12.0°C	13.6°C
Apr	18.0°C	18.0°C	18.0°C	17.9°C	19.0°C
May	23.2°C	22.4°C	23.2°C	23.2°C	23.7°C
Jun	27.4°C	25.5°C	27.4°C	27.6°C	27.6°C
Jul	29.7°C	28.4°C	29.7°C	29.9°C	29.4°C
Aug	30.2°C	29.6°C	30.2°C	30.4°C	30.7°C
Sep	26.5°C	25.2°C	26.5°C	26.6°C	26.5°C
Oct	20.0°C	20.2°C	20.0°C	20.0°C	20.5°C
Nov	12.8°C	14.9°C	12.8°C	12.4°C	14.3°C
Dec	3.8°C	7.2°C	3.8°C	3.3°C	6.3°C
Average	17.5°C	18.7°C	17.6°C	17.6°C	18.2°C

Minimum Temperatures

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	-3.6°C	-1.2°C	-3.6°C	-4.2°C	-2.9°C
Feb	-2.0°C	0.2°C	-2.0°C	-2.3°C	-1.5°C
Mar	3.6°C	4.9°C	3.6°C	3.6°C	2.7°C
Apr	8.9°C	9.2°C	8.9°C	8.9°C	7.5°C
May	13.6°C	13.3°C	13.6°C	13.6°C	12.0°C
Jun	18.7°C	17.8°C	18.7°C	18.9°C	17.1°C
Jul	23.0°C	22.3°C	23.0°C	23.2°C	21.4°C
Aug	23.5°C	23.6°C	23.5°C	23.7°C	21.9°C
Sep	19.2°C	19.5°C	19.2°C	19.3°C	17.3°C
Oct	12.6°C	13.3°C	12.6°C	12.5°C	10.5°C
Nov	5.6°C	7.1°C	5.6°C	5.1°C	4.8°C
Dec	-2.3°C	0.1°C	-2.3°C	-2.8°C	-1.4°C
Average	10.0°C	9.1°C	10.1°C	10.1°C	10.8°C

Maximum/minimum temperature averages are computed by averaging the max/min temperature of each day for a given period.

Conditions

Goyang experiences the highest total sun hours in May, reaching 8.6 hours, while Ulsan has a notable dip in sunshine during September with only 3.7 hours of sun.
Precipitation levels are significantly higher in Goyang during the summer months, particularly in July and August, with over 10 mm of rainfall, compared to Gwangju and Ulsan, which also see high precipitation but slightly lower values.
Overall, while all cities experience seasonal variation in sun hours and precipitation, Goyang stands out for its pronounced summer rainfall contrasted with its higher sunshine hours earlier in the year.

Sunny Weather

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	5.1 hours/day	6.5 hours/day	5.1 hours/day	5.6 hours/day	4.1 hours/day
Feb	5.9 hours/day	6.1 hours/day	5.9 hours/day	6.3 hours/day	4.9 hours/day
Mar	6.6 hours/day	5.9 hours/day	6.6 hours/day	6.8 hours/day	6.4 hours/day
Apr	7.5 hours/day	7.4 hours/day	7.5 hours/day	7.8 hours/day	7.3 hours/day
May	8.2 hours/day	7.9 hours/day	8.2 hours/day	8.6 hours/day	7.3 hours/day
Jun	7.8 hours/day	7.0 hours/day	7.8 hours/day	7.8 hours/day	6.7 hours/day
Jul	4.2 hours/day	4.5 hours/day	4.2 hours/day	3.9 hours/day	3.5 hours/day
Aug	4.6 hours/day	5.1 hours/day	4.6 hours/day	4.1 hours/day	4.2 hours/day
Sep	5.6 hours/day	3.7 hours/day	5.6 hours/day	5.8 hours/day	4.6 hours/day
Oct	6.2 hours/day	5.3 hours/day	6.2 hours/day	6.5 hours/day	6.2 hours/day
Nov	5.2 hours/day	6.3 hours/day	5.2 hours/day	5.6 hours/day	5.6 hours/day
Dec	4.6 hours/day	6.6 hours/day	4.6 hours/day	5.4 hours/day	3.8 hours/day
Average	6.2 hours/day	5.4 hours/day	6.0 hours/day	6.0 hours/day	6.0 hours/day

Sun hours are computed from the number of hours of direct sunlight. The length of the day can affect these measurements; for example, northern cities have longer days in summer.

Precipitation Levels

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	1.0mm	1.3mm	1.0mm	1.0mm	1.1mm
Feb	0.9mm	2.2mm	0.9mm	0.9mm	1.3mm
Mar	1.5mm	3.3mm	1.5mm	1.6mm	2.1mm
Apr	2.3mm	4.3mm	2.3mm	2.2mm	2.3mm
May	4.1mm	3.9mm	4.1mm	4.4mm	3.5mm
Jun	4.2mm	6.7mm	4.2mm	4.6mm	5.8mm
Jul	10.9mm	8.2mm	10.9mm	11.2mm	10.4mm
Aug	10.5mm	7.3mm	10.5mm	10.9mm	7.0mm
Sep	5.7mm	9.0mm	5.7mm	5.4mm	6.0mm
Oct	2.2mm	3.4mm	2.2mm	2.3mm	2.5mm
Nov	2.4mm	1.6mm	2.4mm	2.4mm	1.7mm
Dec	0.9mm	0.9mm	0.9mm	0.7mm	0.8mm
Average	4.0mm	3.7mm	3.9mm	3.9mm	4.3mm

Average amount of precipitation that falls in a form of a rain, snow, sleet or hail.

Wind Speed

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	14.0km/h	17.9km/h	14.0km/h	13.4km/h	15.3km/h
Feb	15.5km/h	18.3km/h	15.5km/h	15.2km/h	16.5km/h
Mar	16.9km/h	19.4km/h	16.9km/h	16.7km/h	16.6km/h
Apr	17.8km/h	19.4km/h	17.8km/h	17.8km/h	17.0km/h
May	17.3km/h	17.8km/h	17.3km/h	17.5km/h	16.3km/h
Jun	15.6km/h	16.0km/h	15.6km/h	15.6km/h	14.0km/h
Jul	14.4km/h	16.5km/h	14.4km/h	14.7km/h	13.5km/h
Aug	13.9km/h	17.1km/h	13.9km/h	14.1km/h	12.7km/h
Sep	13.6km/h	18.5km/h	13.6km/h	13.4km/h	11.7km/h
Oct	13.7km/h	17.4km/h	13.7km/h	13.7km/h	12.2km/h
Nov	15.0km/h	16.5km/h	15.0km/h	14.8km/h	14.9km/h
Dec	14.9km/h	17.6km/h	14.9km/h	14.4km/h	15.3km/h
Average	15.1km/h	14.7km/h	15.2km/h	15.2km/h	17.7km/h

Humidity

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	51.9%	55.5%	51.9%	49.8%	68.4%
Feb	51.5%	56.7%	51.5%	49.7%	64.3%
Mar	50.5%	61.3%	50.5%	48.4%	62.2%
Apr	50.2%	63.3%	50.2%	47.7%	61.4%
May	57.1%	68.5%	57.1%	54.5%	66.6%
Jun	63.1%	77.0%	63.1%	60.2%	72.0%
Jul	74.8%	83.7%	74.8%	70.5%	83.1%
Aug	72.9%	80.7%	72.9%	67.7%	81.4%
Sep	65.3%	79.0%	65.3%	59.9%	78.8%
Oct	54.2%	68.0%	54.2%	51.1%	69.9%
Nov	50.9%	60.9%	50.9%	49.0%	65.1%
Dec	54.4%	56.0%	54.4%	51.6%	69.0%
Average	55.0%	70.2%	58.1%	58.1%	67.6%

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Astronomy

Ulsan has the earliest sunrise and sunset times throughout the year compared to the other cities.
Goyang and Tongjin share the identical earliest sunrise time while Goyang also has latest overall sunset time.
Gwangju experiences the shortest longest day, indicating a slightly smaller range in daylight hours.
The latest sunrise occurs in January across all locations, while the earliest sunsets are in December, consistent with seasonal patterns, which also shows that day lenght is shortest in December and longest in June.

Sunrise Time

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	7:44	7:31	7:43	7:44	7:40
Feb	7:21	7:10	7:20	7:22	7:19
Mar	6:42	6:32	6:41	6:42	6:42
Apr	5:58	5:50	5:57	5:58	6:00
May	5:24	5:19	5:23	5:23	5:29
Jun	5:12	5:08	5:11	5:11	5:18
Jul	5:25	5:20	5:24	5:24	5:30
Aug	5:49	5:43	5:49	5:49	5:52
Sep	6:14	6:05	6:13	6:14	6:15
Oct	6:40	6:29	6:40	6:41	6:39
Nov	7:11	6:58	7:10	7:12	7:08
Dec	7:38	7:25	7:38	7:40	7:34
Average	6:24	6:30	6:24	6:24	6:18

Sunrise times are output in the local timezone of each place.

Sunset Time

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	17:39	17:34	17:38	17:38	17:44
Feb	18:11	18:04	18:10	18:10	18:14
Mar	18:40	18:31	18:39	18:40	18:40
Apr	19:07	18:56	19:07	19:08	19:05
May	19:34	19:21	19:34	19:35	19:31
Jun	19:53	19:40	19:53	19:54	19:49
Jul	19:51	19:37	19:50	19:52	19:47
Aug	19:23	19:11	19:22	19:23	19:20
Sep	18:39	18:29	18:38	18:40	18:39
Oct	17:55	17:47	17:54	17:55	17:57
Nov	17:23	17:17	17:22	17:22	17:27
Dec	17:17	17:13	17:17	17:17	17:23
Average	18:36	18:36	18:36	18:36	18:30

Sunset times are output in the local timezone of each place.

Useful Day Length

Period	Suwon	Ulsan	Tongjin	Goyang	Gwangju
Jan	9:55 hours	10:04 hours	9:55 hours	9:54 hours	10:04 hours
Feb	10:50 hours	10:55 hours	10:50 hours	10:49 hours	10:55 hours
Mar	11:40 hours	11:31 hours	11:39 hours	11:40 hours	11:40 hours
Apr	12:07 hours	11:56 hours	12:07 hours	12:08 hours	12:05 hours
May	12:34 hours	12:21 hours	12:34 hours	12:35 hours	12:31 hours
Jun	12:53 hours	12:40 hours	12:53 hours	12:54 hours	12:49 hours
Jul	12:51 hours	12:37 hours	12:50 hours	12:52 hours	12:47 hours
Aug	12:23 hours	12:11 hours	12:22 hours	12:23 hours	12:20 hours
Sep	11:39 hours	11:29 hours	11:38 hours	11:40 hours	11:39 hours
Oct	10:55 hours	10:47 hours	10:54 hours	10:55 hours	10:57 hours
Nov	10:11 hours	10:17 hours	10:12 hours	10:10 hours	10:19 hours
Dec	9:39 hours	9:48 hours	9:39 hours	9:37 hours	9:49 hours
Average	11:30 hours	11:30 hours	11:30 hours	11:30 hours	11:24 hours

Discards daylight hours before 7 AM. In places that are located to the west of the timezone, the sun rises and sets later compared to the cities that are located to the east. This means that the useful day length is longer in the cities located to the west of the time zone.