Weather Almanac: San Sebastian, PR 00685

🗓️ Historical norms for September 2026

August October

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

September avg. precipitation

🌧️ 8.61"

September days below freezing

📉 ≈0.0 days

Average September lows 67°F – 69°F

USDA Zone

12b

Annual extreme lows 55°F to 60°F

Last Spring Frost (36°F)

🌷 Rare

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First Fall Frost (36°F)

🍂 Rare

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F: Forecast

H: Normal High Temp

L: Normal Low Temp

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Tue. September 1

🌅 6:13 a.m.

H: 91°F – 94°F

L: 66°F – 71°F

🌇 6:41 p.m.

Wed. September 2

🌅 6:13 a.m.

H: 91°F – 94°F

L: 66°F – 71°F

🌇 6:41 p.m.

Thu. September 3

🌅 6:13 a.m.

H: 91°F – 95°F

L: 66°F – 71°F

🌇 6:40 p.m.

Fri. September 4

🌅 6:13 a.m.

H: 91°F – 95°F

L: 66°F – 71°F

🌇 6:39 p.m.

Sat. September 5

🌅 6:14 a.m.

H: 91°F – 95°F

L: 66°F – 71°F

🌇 6:38 p.m.

Sun. September 6

🌅 6:14 a.m.

H: 91°F – 95°F

L: 66°F – 71°F

🌇 6:37 p.m.

Mon. September 7 Labor Day

🌅 6:14 a.m.

H: 91°F – 95°F

L: 66°F – 71°F

🌇 6:36 p.m.

Tue. September 8

🌅 6:14 a.m.

H: 91°F – 95°F

L: 66°F – 71°F

🌇 6:36 p.m.

Wed. September 9

🌅 6:14 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:35 p.m.

Thu. September 10

🌅 6:14 a.m.

H: 91°F – 95°F

L: 65°F – 71°F

🌇 6:34 p.m.

Fri. September 11

🌅 6:15 a.m.

H: 91°F – 95°F

L: 65°F – 71°F

🌇 6:33 p.m.

Sat. September 12

🌅 6:15 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:32 p.m.

Sun. September 13

🌅 6:15 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:31 p.m.

Mon. September 14 Holy Cross

🌅 6:15 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:30 p.m.

Tue. September 15

🌅 6:15 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:30 p.m.

Wed. September 16

🌅 6:15 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:29 p.m.

Thu. September 17

🌅 6:16 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:28 p.m.

Fri. September 18

🌅 6:16 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:27 p.m.

Sat. September 19

🌅 6:16 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:26 p.m.

Sun. September 20

🌅 6:16 a.m.

H: 91°F – 95°F

L: 65°F – 70°F

🌇 6:25 p.m.

Mon. September 21

🌅 6:16 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:24 p.m.

Tue. September 22 Autumn Equinox

🌅 6:16 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:24 p.m.

Wed. September 23

🌅 6:17 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:23 p.m.

Thu. September 24

🌅 6:17 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:22 p.m.

Fri. September 25

🌅 6:17 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:21 p.m.

Sat. September 26

🌅 6:17 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:20 p.m.

Sun. September 27

🌅 6:17 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:19 p.m.

Mon. September 28

🌅 6:17 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:18 p.m.

Tue. September 29

🌅 6:18 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:17 p.m.

Wed. September 30

🌅 6:18 a.m.

H: 91°F – 94°F

L: 65°F – 70°F

🌇 6:17 p.m.

August October

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

Temperature climatic data from weather station: SAN SEBASTIAN 2 WNW (RQC00668881)

Precipitation climatic data from weather station: GUAJATACA DAM (RQC00663904)

Agricultural climatic data from weather station: SAN SEBASTIAN 2 WNW (RQC00668881)