Climatch

Santiago vs Castro Valley Climate

86%match

Santiago and Castro Valley are a 86% climate match. Compared with Santiago, Castro Valley has 5°F (3°C) cooler summer days and 4°F (2°C) milder winter nights.

Santiago gets 15 in (372 mm) of rain a year and Castro Valley 17 in (441 mm). Santiago's warmest month is January, at 86°F (30°C); Castro Valley's is September, at 81°F (27°C).

Castro Valley is in the Northern Hemisphere, so its seasons are flipped: Santiago's July is most like Castro Valley's January.

JanFebMarAprMayJunJulAugSepOctNovDecJFMAMJJASOND
Santiago
JanFebMarAprMayJunJulAugSepOctNovDecJFMAMJJASOND
Castro Valley

Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.

Month by month

Highs and lows (°F)

SantiagoCastro Valley (6 months later)solid = high, dashed = low

20°40°60°80°100°JFMAMJJASONDSantiago Jan: 86°Santiago Feb: 84°Santiago Mar: 80°Santiago Apr: 72°Santiago May: 64°Santiago Jun: 57°Santiago Jul: 58°Santiago Aug: 61°Santiago Sep: 66°Santiago Oct: 71°Santiago Nov: 78°Santiago Dec: 83°Santiago Jan: 58°Santiago Feb: 56°Santiago Mar: 53°Santiago Apr: 47°Santiago May: 43°Santiago Jun: 40°Santiago Jul: 38°Santiago Aug: 41°Santiago Sep: 44°Santiago Oct: 48°Santiago Nov: 51°Santiago Dec: 55°Castro Valley (6 months later) Jan: 79°Castro Valley (6 months later) Feb: 80°Castro Valley (6 months later) Mar: 81°Castro Valley (6 months later) Apr: 76°Castro Valley (6 months later) May: 67°Castro Valley (6 months later) Jun: 60°Castro Valley (6 months later) Jul: 59°Castro Valley (6 months later) Aug: 63°Castro Valley (6 months later) Sep: 66°Castro Valley (6 months later) Oct: 70°Castro Valley (6 months later) Nov: 73°Castro Valley (6 months later) Dec: 78°Castro Valley (6 months later) Jan: 57°Castro Valley (6 months later) Feb: 57°Castro Valley (6 months later) Mar: 56°Castro Valley (6 months later) Apr: 52°Castro Valley (6 months later) May: 47°Castro Valley (6 months later) Jun: 43°Castro Valley (6 months later) Jul: 43°Castro Valley (6 months later) Aug: 45°Castro Valley (6 months later) Sep: 47°Castro Valley (6 months later) Oct: 48°Castro Valley (6 months later) Nov: 51°Castro Valley (6 months later) Dec: 55°

Rain (in per month)

SantiagoCastro Valley (6 months later)

024JFMAMJJASONDSantiago Jan: 0.0Santiago Feb: 0.1Santiago Mar: 0.2Santiago Apr: 0.8Santiago May: 2.4Santiago Jun: 3.8Santiago Jul: 2.6Santiago Aug: 2.4Santiago Sep: 1.1Santiago Oct: 0.7Santiago Nov: 0.3Santiago Dec: 0.1Castro Valley (6 months later) Jan: 0.0Castro Valley (6 months later) Feb: 0.0Castro Valley (6 months later) Mar: 0.1Castro Valley (6 months later) Apr: 1.0Castro Valley (6 months later) May: 1.9Castro Valley (6 months later) Jun: 3.1Castro Valley (6 months later) Jul: 3.5Castro Valley (6 months later) Aug: 3.3Castro Valley (6 months later) Sep: 2.5Castro Valley (6 months later) Oct: 1.3Castro Valley (6 months later) Nov: 0.6Castro Valley (6 months later) Dec: 0.2

Monthly averages

Average monthly highs, lows and rain in Santiago and Castro Valley
MonthHighLowRain
SantiagoCastro ValleySantiagoCastro ValleySantiagoCastro Valley
Jan86°F(30°C)59°F(15°C)58°F(15°C)43°F(6°C)0.0 in(1 mm)3.5 in(89 mm)
Feb84°F(29°C)63°F(17°C)56°F(14°C)45°F(7°C)0.1 in(3 mm)3.3 in(83 mm)
Mar80°F(26°C)66°F(19°C)53°F(11°C)47°F(8°C)0.2 in(6 mm)2.5 in(63 mm)
Apr72°F(22°C)70°F(21°C)47°F(9°C)48°F(9°C)0.8 in(20 mm)1.3 in(33 mm)
May64°F(18°C)73°F(23°C)43°F(6°C)51°F(11°C)2.4 in(61 mm)0.6 in(14 mm)
Jun57°F(14°C)78°F(25°C)40°F(4°C)55°F(13°C)3.8 in(97 mm)0.2 in(4 mm)
Jul58°F(14°C)79°F(26°C)38°F(3°C)56°F(14°C)2.6 in(65 mm)0.0 in(1 mm)
Aug61°F(16°C)80°F(27°C)40°F(5°C)57°F(14°C)2.4 in(62 mm)0.0 in(1 mm)
Sep66°F(19°C)81°F(27°C)44°F(7°C)56°F(13°C)1.1 in(27 mm)0.1 in(2 mm)
Oct71°F(22°C)76°F(25°C)48°F(9°C)52°F(11°C)0.7 in(18 mm)1.0 in(26 mm)
Nov78°F(26°C)67°F(19°C)51°F(11°C)47°F(8°C)0.4 in(9 mm)1.9 in(47 mm)
Dec83°F(29°C)60°F(16°C)55°F(13°C)43°F(6°C)0.1 in(3 mm)3.1 in(78 mm)

1991–2020 averages, by calendar month.

More comparisons

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