As of 07:18 PDT

Weather in Grinnell, WA

43°

Grinnell, Sunday, 11 October, 07:18

Overcast. Feels like 37°. High 47°, low 41°.

Pressure29.80 inHg

Wind10.8 mph NE

Humidity66%

Visibility6.2 mi

Dew point32°

See detailed hourly forecast

Monthly outlook for Grinnell, WA: average high 59.8°, average low 40.9°. That is 1.2° above the climate normal for October. Precipitation is expected on 0 days (about 0.1 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 16 October (74.4°), the coolest 13 October (30.8°).

59.8°/40.9°

Average high / low

+1.2°

Above normal

0 / 4

Wet days / normal

0.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
11 October – 20 October	60.8°	58.9°	+1.1°
21 October – 30 October	58.1°	53.9°	+2.4°
31 October – 9 November	at normal	48.6°	—

October records over 66 years

85.3°2 October 1987All-time high

9.7°26 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Garfield (5 mi).

Mon, 1253° / 38°

0.03

53 °

Grinnell, Monday, 12 October

Light rain. High 53°, low 38°.

Pressure30.03 inHg

Wind1.1 mph W

Humidity52%

Visibility6.2 mi

Dew point32°

Tue, 1357° / 31°

57 °

Grinnell, Tuesday, 13 October

Mostly clear. High 57°, low 31°.

Pressure30.15 inHg

Wind1.4 mph SW

Humidity44%

Visibility6.2 mi

Dew point30°

Wed, 1461° / 35°

61 °

Grinnell, Wednesday, 14 October

Mostly clear. High 61°, low 35°.

Pressure30.24 inHg

Wind4.1 mph SW

Humidity36%

Visibility6.2 mi

Dew point29°

Thu, 1569° / 36°

69 °

Grinnell, Thursday, 15 October

Mostly clear. High 69°, low 36°.

Pressure30.42 inHg

Wind6.3 mph E

Humidity37%

Visibility—

Dew point32°

Fri, 1674° / 48°

74 °

Grinnell, Friday, 16 October

Clear. High 74°, low 48°.

Pressure30.24 inHg

Wind10 mph SE

Humidity34%

Visibility—

Dew point36°

Sat, 1770° / 50°

70 °

Grinnell, Saturday, 17 October

Overcast. High 70°, low 50°.

Pressure30.06 inHg

Wind15 mph W

Humidity33%

Visibility—

Dew point34°

Sun, 1864° / 47°

64 °

Grinnell, Sunday, 18 October

Overcast. High 64°, low 47°.

Pressure30.03 inHg

Wind7.4 mph W

Humidity45%

Visibility—

Dew point37°

Mon, 1959° / 45°

59 °

Grinnell, Monday, 19 October

Overcast. High 59°, low 45°.

Pressure29.97 inHg

Wind19.3 mph W

Humidity40%

Visibility—

Dew point32°

Tue, 2054° / 39°

54 °

Grinnell, Tuesday, 20 October

Mostly clear. High 54°, low 39°.

Pressure30.15 inHg

Wind9.7 mph W

Humidity55%

Visibility—

Dew point33°

Wed, 2155° / 40°

55 °

Grinnell, Wednesday, 21 October

Partly cloudy. High 55°, low 40°.

Pressure30.12 inHg

Wind7.6 mph SW

Humidity44%

Visibility—

Dew point29°

Thu, 2258° / 39°

58 °

Grinnell, Thursday, 22 October

Partly cloudy. High 58°, low 39°.

Pressure30.15 inHg

Wind7.4 mph SE

Humidity42%

Visibility—

Dew point29°

Fri, 2358° / 44°

58 °

Grinnell, Friday, 23 October

Overcast. High 58°, low 44°.

Pressure30.06 inHg

Wind16.7 mph W

Humidity37%

Visibility—

Dew point27°

Sat, 2459° / 42°

59 °

Grinnell, Saturday, 24 October

Overcast. High 59°, low 42°.

Pressure30.18 inHg

Wind7.9 mph W

Humidity49%

Visibility—

Dew point34°

Sun, 2558° / 39°

58 °

Grinnell, Sunday, 25 October

Overcast. High 58°, low 39°.

Pressure30.42 inHg

Wind4.7 mph E

Humidity42%

Visibility—

Dew point28°

Mon, 2661° / 41°

61 °

Grinnell, Monday, 26 October

Overcast. High 61°, low 41°.

Pressure30.18 inHg

Wind9.8 mph SW

Humidity34%

Visibility—

Dew point26°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 2752° / 37°

0.07

52 °

Grinnell, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.07 in

Chance of precipitation38%

Record high70° (1965)

Record low17° (2020)

Wed, 2852° / 37°

0.07

52 °

Grinnell, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.07 in

Chance of precipitation38%

Record high67° (1987)

Record low20° (2023)

Thu, 2951° / 36°

0.1

51 °

Grinnell, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.1 in

Chance of precipitation35%

Record high69° (1962)

Record low16° (2019)

Fri, 3051° / 36°

0.08

51 °

Grinnell, Friday, 30 October

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.08 in

Chance of precipitation32%

Record high68° (2008)

Record low16° (2019)

Sat, 3150° / 36°

0.11

50 °

Grinnell, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high50°

Average low36°

Average precipitation0.11 in

Chance of precipitation30%

Record high68° (1988)

Record low16° (1984)

Sun, 0150° / 35°

0.12

50 °

Grinnell, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.12 in

Chance of precipitation43%

Record high68° (1965)

Record low19° (2002)

Mon, 0250° / 35°

0.11

50 °

Grinnell, Monday, 2 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.11 in

Chance of precipitation37%

Record high66° (1981)

Record low13° (1973)

Tue, 0350° / 35°

0.05

50 °

Grinnell, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.05 in

Chance of precipitation30%

Record high64° (1965)

Record low13° (1973)

Wed, 0449° / 36°

0.14

49 °

Grinnell, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high49°

Average low36°

Average precipitation0.14 in

Chance of precipitation48%

Record high65° (1975)

Record low18° (1973)

Thu, 0548° / 35°

0.09

48 °

Grinnell, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high48°

Average low35°

Average precipitation0.09 in

Chance of precipitation45%

Record high64° (1987)

Record low15° (1973)

Fri, 0648° / 35°

0.11

48 °

Grinnell, Friday, 6 November

Climate normal for this date — 60-year average.

Average high48°

Average low35°

Average precipitation0.11 in

Chance of precipitation48%

Record high64° (2012)

Record low21° (1994)

Sat, 0747° / 35°

0.15

47 °

Grinnell, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high47°

Average low35°

Average precipitation0.15 in

Chance of precipitation45%

Record high67° (1999)

Record low21° (1973)

Sun, 0847° / 34°

0.08

47 °

Grinnell, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.08 in

Chance of precipitation37%

Record high65° (2016)

Record low19° (1986)

Mon, 0947° / 34°

0.09

47 °

Grinnell, Monday, 9 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.09 in

Chance of precipitation42%

Record high61° (2016)

Record low16° (1986)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Grinnell, WA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Grinnell, WA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.