Top Climate & Environment subreddits

Largest Climate & Environment subreddits

Largest Climate & Environment subreddits

#	Subreddit	Members	12-mo growth	Commenters / mo
1	r/environment	1.56M	+1.1%	2,385
2	r/raining	586,025	+8.7%	1,149
3	E r/energy	298,780	+18%	9,549
4	r/climate	297,447	+13%	5,089
5	r/DisasterUpdate	189,051	+57%	3,973
6	C r/climatechange	184,700	+24%	4,360
7	r/RenewableEnergy	163,598	+11%	468
8	r/TropicalWeather	162,597	+3.6%	228
9	r/weather	159,121	+12%	2,431
10	r/meteorology	106,811	+50%	1,608
11	r/ClimateActionPlan	105,367	+5.1%	31
12	L r/Lightning	103,407	+51%	626
13	r/hurricane	100,026	+13%	325
14	r/UKWeather	97,271	+28%	7,550
15	r/ClimateOffensive	96,184	+14%	751
16	r/conservation	92,746	+22%	712
17	r/Environmentalism	84,216	+67%	2,756
18	r/storms	70,729	–	515
19	r/TornadoEncounters	69,528	+24%	34
20	r/CrazyFreakingWeather	61,822	–	173
21	r/ClimateShitposting	56,952	+37%	3,228
22	r/Thunderstorms	49,433	–	173
23	r/Tornadoes	46,040	–	495
24	r/ClimateMemes	45,680	+17%	295
25	A r/AirQuality	38,439	+68%	826

Fastest growing Climate & Environment subreddits

Member growth over 12 months, among subreddits that had at least 18,251 members a year ago.

Fastest growing Climate & Environment subreddits

#	Subreddit	12-mo growth	Members gained	Members	Commenters / mo
1	A r/AirQuality	+68%	+15,492	38,439	826
2	r/Environmentalism	+67%	+33,807	84,216	2,756
3	r/DisasterUpdate	+57%	+68,559	189,051	3,973
4	L r/Lightning	+51%	+34,986	103,407	626
5	r/meteorology	+50%	+35,485	106,811	1,608
6	r/ClimateShitposting	+37%	+15,349	56,952	3,228
7	r/UKWeather	+28%	+21,563	97,271	7,550
8	C r/climatechange	+24%	+35,195	184,700	4,360
9	r/TornadoEncounters	+24%	+13,247	69,528	34
10	r/conservation	+22%	+16,701	92,746	712
11	E r/energy	+18%	+44,528	298,780	9,549
12	r/ClimateMemes	+17%	+6,573	45,680	295
13	r/ClimateOffensive	+14%	+11,903	96,184	751
14	r/climate	+13%	+34,695	297,447	5,089
15	r/hurricane	+13%	+11,374	100,026	325
16	R r/Renewable	+13%	+2,494	22,133	96
17	r/weather	+12%	+17,513	159,121	2,431
18	r/RenewableEnergy	+11%	+16,846	163,598	468
19	r/raining	+8.7%	+46,848	586,025	1,149
20	r/ClimateActionPlan	+5.1%	+5,136	105,367	31
21	r/TropicalWeather	+3.6%	+5,718	162,597	228
22	r/environment	+1.1%	+16,468	1.56M	2,385

Most members gained

Climate & Environment subreddits that gained the most members

#	Subreddit	Members gained	12-mo growth	Members	Commenters / mo
1	r/DisasterUpdate	+68,559	+57%	189,051	3,973
2	r/raining	+46,848	+8.7%	586,025	1,149
3	E r/energy	+44,528	+18%	298,780	9,549
4	r/meteorology	+35,485	+50%	106,811	1,608
5	C r/climatechange	+35,195	+24%	184,700	4,360
6	L r/Lightning	+34,986	+51%	103,407	626
7	r/climate	+34,695	+13%	297,447	5,089
8	r/Environmentalism	+33,807	+67%	84,216	2,756
9	r/UKWeather	+21,563	+28%	97,271	7,550
10	r/weather	+17,513	+12%	159,121	2,431
11	r/RenewableEnergy	+16,846	+11%	163,598	468
12	r/conservation	+16,701	+22%	92,746	712
13	r/environment	+16,468	+1.1%	1.56M	2,385
14	A r/AirQuality	+15,492	+68%	38,439	826
15	r/ClimateShitposting	+15,349	+37%	56,952	3,228
16	r/TornadoEncounters	+13,247	+24%	69,528	34
17	r/ClimateOffensive	+11,903	+14%	96,184	751
18	r/hurricane	+11,374	+13%	100,026	325
19	r/ClimateMemes	+6,573	+17%	45,680	295
20	r/TropicalWeather	+5,718	+3.6%	162,597	228
21	r/ClimateActionPlan	+5,136	+5.1%	105,367	31
22	R r/Renewable	+2,494	+13%	22,133	96

Most active Climate & Environment subreddits

People who comment in a month, the average of the three months ending September 2026.

Most active Climate & Environment subreddits

#	Subreddit	Commenters / mo	Posts / mo	Members
1	E r/energy	9,549	744	298,780
2	r/UKWeather	7,550	416	97,271
3	r/climate	5,089	1,102	297,447
4	C r/climatechange	4,360	689	184,700
5	C r/ClimateNews	4,315	509	36,753
6	r/DisasterUpdate	3,973	351	189,051
7	r/ClimateShitposting	3,228	189	56,952
8	r/Environmentalism	2,756	351	84,216
9	r/EF5	2,755	675	32,672
10	r/weather	2,431	620	159,121
11	r/environment	2,385	566	1.56M
12	r/Klimawandel	1,748	142	20,511
13	r/ClimateCrisisCanada	1,688	185	15,541
14	r/meteorology	1,608	433	106,811
15	r/EnvironmentalNews	1,216	438	6,070
16	r/raining	1,149	539	586,025
17	r/Energiewirtschaft	883	127	24,262
18	A r/AirQuality	826	216	38,439
19	r/environment2	788	121	4,722
20	r/ClimateOffensive	751	116	96,184
21	r/electrifyeverything	738	294	6,298
22	r/conservation	712	211	92,746
23	E r/enviroaction	642	98	16,760
24	L r/Lightning	626	288	103,407
25	r/INFPIdeas	566	541	5,744

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How these lists are made

• Members are the member counts measured in October 2026.
• Activity (commenters and posts per month) is the average of the three months ending September 2026. Posts by known bots are not counted.
• 12-month growth compares members now with members a year earlier. A subreddit is ranked by growth only if it already had at least 18,251 members a year ago (the median for subreddits with a known growth), so brand-new communities don't top the list from a base of zero. Subreddits with more monthly active users than 0.808 per member, a sign of inflated activity, are left out of the growth and activity lists.
• NSFW communities are excluded: those Reddit marks as 18+, those where most posts are NSFW, and the Adult Content topic.
• Topics follow Reddit's own community categories.
• The lists are rebuilt every month. Each list shows the top 25 (100 for the largest subreddits overall). Download all lists as CSV (free to reuse under CC BY 4.0, with a link to this page).