Marathon Weather
During the CIM's history, the vast majority of the races have had perfect running conditions - no rain, very light winds and temperatures that range in the low 40s (F) at the start to the upper 50s/low 60s (F) at the finish. There were less than a handful of CIMs with noticeable rain (15%) and two of those rain days (7%) were described as storm conditions with gusting winds.
Using National Weather Service statistics that include what would have been CIM dates in the 10 years before 1983, the chance of rain is 11% and the chance of storm is 5%.
Check out the tables before for more detailed weather information.
CIM Archives/National Weather Service Stats for California International Marathon Conditions
| Date | Conditions | Mean | Actual Max | Ave. Max | Actual Min | Ave. Min | Actual Precip. |
|---|---|---|---|---|---|---|---|
| CIM I - Dec. 4, 1983 | Clear, cool, sunny | 47 F | 57 F | 56 F | 37 F | 39 F | 0.00 in |
| CIM II - Dec. 2, 1984 | Clear, cool, sunny | 48 F | 52 F | 57 F | 42 F | 39 F | 0.42 in |
| CIM III - Dec. 8, 1985 | Clear, cool, sunny | 47 F | 56 F | 55 F | 36 F | 38 F | 0.00 in |
| CIM IV - Dec. 7, 1986 | Clear, cool, sunny | 47 F | 66 F | 56 F | 42 F | 38 F | 0.00 in |
| CIM V - Dec. 6, 1987 | Wind, rain | 47 F | 59 F | 56 F | 50 F | 39 F | 0.46 in |
| CIM VI - Dec. 4, 1988 | Clear, cool, sunny | 47 F | 65 F | 56 F | 35 F | 39 F | 0.00 in |
| CIM VII - Dec. 3, 1989 | Early fog, cool, sunny | 48 F | 61 F | 57 F | 34 F | 39 F | 0.00 in |
| CIM VIII - Dec. 2, 1990 | Clear, cool, sunny | 48 F | 57 F | 57 F | 31 F | 39 F | 0.00 in |
| CIM IX - Dec. 8, 1991 | Clear, cool, sunny | 47 F | 63 F | 55 F | 40 F | 38 F | 0.00 in |
| CIM X - Dec. 6, 1992 | Wind, rain | 47 F | 53 F | 56 F | 47 F | 39 F | 0.51 in |
| CIM XI - Dec. 5, 1993 | Clear, cool, sunny | 47 F | 60 F | 56 F | 32 F | 39 F | 0.00 in |
| CIM XII - Dec. 4, 1994 | Cool, drizzle, overcast | 47 F | - | 56 F | - | 39 F | - |
| CIM XIII - Dec. 3, 1995 | Clear, cool, sunny | 48 F | - | 57 F | - | 39 F | - |
| CIM XIV - Dec. 8, 1996 | Clear, cool, sunny | 56 F | 62 F | 55 F | 51 F | 38 F | 0.00 in |
| CIM XV - Dec. 7, 1997 | Wind, rain | 50 F | 53 F | 56 F | 46 F | 38 F | 0.16 in |
| CIM XVI - Dec. 6, 1998 | Cool, cloudy | 40 F | 48 F | 56 F | 32 F | 39 F | 0.00 in |
| CIM XVII - Dec. 5, 1999 | Clear, cool, sunny | 44 F | 55 F | 56 F | 33 F | 39 F | 0.00 in |
| CIM XVIII - Dec. 3, 2000 | Fog, cool | 44 F | 51 F | 57 F | 37 F | 39 F | 0.00 in |
| CIM XIX - Dec. 2, 2001 | Wind, rain | 52 F | 59 F | 57 F | 46 F | 39 F | 1.09 in |
| CIM XX - Dec. 8, 2002 | Clear, cool, sunny | 50 F | 60 F | 55 F | 39 F | 38 F | 0.00 in |
| CIM XXI - Dec. 7, 2003 | Clear, cool, sunny | 52 F | 62 F | 56 F | 42 F | 38 F | 0.00 in |
| CIM XXII - Dec. 5, 2004 | Clear, cool, sunny | 45 F | 55 F | 56 F | 35 F | 39 F | 0.00 in |
| CIM XXIII - Dec. 4, 2005 | Clear, cool, sunny | 43 F | 55 F | 56 F | 31 F | 39 F | 0.00 in |
| CIM XXIV - Dec. 3, 2006 | Clear, cool, sunny | 47 F | 63 F | 57 F | 31 F | 39 F | 0.00 in |
| CIM XXV - Dec. 2, 2007 | Clear, cool, sunny | 51 F | 60 F | 57 F | 41 F | 39 F | 0.00 in |
| CIM XXVI - Dec. 7, 2008 | Clear, cool, sunny | 43 F | 45 F | 56 F | 41 F | 38 F | 0.00 in |
| CIM XXVII - Dec. 6, 2009 | Scattered clouds | 39 F | 51 F | 56 F | 27 F | 39 F | 0.13 in |
| CIM XXVIII - Dec. 5, 2010 | Scattered clouds | 52 F | 58 F | 56 F | 46 F | 39 F | 0.26 in |
| CIM XXVIV - Dec. 4, 2011 | Clear, cool, sunny | 44 F | 58 F | - | 31 F | - | - |
| CIM XXX - Dec. 2, 2012 | Wind, rain | 53 F | 62 F | - | 45 F | - | 0.49 in |
CIM Hourly Weather Conditions - National Weather Service 2004-2010
| Time (PST) | High Temp. | Low Temp. | Humidity | Wind Dir. | Wind Speed | Gust Speed | Conditions |
|---|---|---|---|---|---|---|---|
| CIM XXII - Dec. 5, 2004 | |||||||
| 6:53 AM | 35.1 F | 32.0 F | 89% | NNW | 8.1 mph | - | Clear |
| 7:16 AM | 35.6 F | 32.0 F | 87% | NNW | 8.1 mph | - | Clear |
| 7:53 AM | 37.0 F | 32.0 F | 82% | NNW | 8.1 mph | - | Haze |
| 8:53 AM | 39.9 F | 33.1 F | 77% | NNW | 5.8 mph | - | Haze |
| 9:53 AM | 44.1 F | 34.0 F | 68% | North | 6.9 mph | - | Haze |
| 10:53 AM | 48.0 F | 35.1 F | 61% | NW | 9.2 mph | - | Haze |
| 11:53 AM | 51.1 F | 35.1 F | 54% | NNW | 9.2 mph | - | Clear |
| CIM XXIII - Dec. 4, 2005 | |||||||
| 6:53 AM | 32.0 F | 28.9 F | 88% | Calm | Calm | - | Clear |
| 7:53 AM | 34.0 F | 30.0 F | 85% | North | 4.6 mph | - | Clear |
| 8:53 AM | 42.1 F | 30.9 F | 65% | NE | 6.9 mph | - | Clear |
| 9:53 AM | 45.0 F | 32.0 F | 60% | NNE | 5.8 mph | - | Clear |
| 10:53 AM | 46.9 F | 33.1 F | 59% | East | 5.8 mph | - | Clear |
| 11:53 AM | 50.0 F | 34.0 F | 54% | Calm | Calm | - | Clear |
| CIM XXIV - Dec. 3, 2006 | |||||||
| 6:34 AM | 32.0 F | 30.2 F | 93% | Calm | Calm | - | Fog |
| 6:45 AM | 32.0 F | 30.2 F | 93% | Calm | Calm | - | Fog |
| 6:51 AM | 32.0 F | 30.2 F | 93% | Calm | Calm | - | Clear |
| 6:53 AM | 32.0 F | 30.0 F | 92% | Calm | Calm | - | Clear |
| 7:02 AM | 32.0 F | 30.2 F | 93% | Calm | Calm | - | Clear |
| 7:53 AM | 33.1 F | 30.9 F | 92% | Calm | Calm | - | Clear |
| 8:53 AM | 43.0 F | 37.9 F | 82% | NNW | 4.6 mph | - | Haze |
| 9:53 AM | 50.0 F | 37.0 F | 61% | North | 4.6 mph | - | Haze |
| 10:53 AM | 54.0 F | 37.9 F | 55% | NNW | 5.8 mph | - | Haze |
| 11:53 AM | 57.0 F | 37.0 F | 47% | North | 5.8 mph | - | Clear |
| CIM XXV - Dec. 2, 2007 | |||||||
| 6:53 AM | 43.0 F | 28.0 F | 56% | SE | 3.5 mph | - | Clear |
| 7:53 AM | 42.1 F | 28.9 F | 60% | SE | 4.6 mph | - | Clear |
| 8:53 AM | 46.0 F | 28.0 F | 50% | SE | 13.8 mph | 19.6 mph | Clear |
| 9:25 AM | 48.2 F | 26.6 F | 43% | SSE | 10.4 mph | 19.6 mph | Clear |
| 9:53 AM | 52.0 F | 26.1 F | 37% | SSE | 12.7 mph | 23.0 mph | Clear |
| 10:53 AM | 54.0 F | 28.9 F | 38% | SE | 15.0 mph | 20.7 mph | Overcast |
| 11:53 AM | 55.0 F | 28.9 F | 37% | SSE | 15.0 mph | 20.7 mph | Clear |
| CIM XXIII - Dec. 7, 2008 | |||||||
| 6:00 AM | 42.8 F | 39.2 F | 87% | ENE | 3.5 mph | - | Overcast |
| 6:34 AM | 41.0 F | 39.2 F | 93% | Calm | Calm | - | Overcast |
| 6:53 AM | 42.1 F | 39.0 F | 89% | Calm | Calm | - | Overcast |
| 7:53 AM | 41.0 F | 39.0 F | 93% | NW | 3.5 mph | - | Overcast |
| 8:19 AM | 41.0 F | 39.2 F | 93% | NNW | 3.5 mph | - | Overcast |
| 8:53 AM | 42.1 F | 39.9 F | 92% | Calm | Calm | - | Overcast |
| 9:53 AM | 42.1 F | 39.9 F | 92% | Calm | Calm | - | Overcast |
| 10:53 AM | 43.0 F | 39.9 F | 89% | Calm | Calm | - | Overcast |
| 11:05 AM | 44.6 F | 39.2 F | 81% | Calm | Calm | - | Overcast |
| 11:33 AM | 42.8 F | 39.2 F | 87% | Calm | Calm | - | Overcast |
| 11:53 AM | 43.0 F | 39.9 F | 89% | NNW | 3.5 mph | - | Overcast |
| CIM XXIV - Dec. 6, 2009 | |||||||
| 6:53 AM | 30.0 F | 21.9 F | 72% | SE | 8.1 mph | - | Clear |
| 7:23 AM | 32.0 F | 21.2 F | 64% | SSE | 11.5 mph | 17.3 mph | Mostly Cloudy |
| 7:34 AM | 33.8 F | 21.2 F | 60% | SSE | 10.4 mph | 18.4 mph | Overcast |
| 7:53 AM | 35.1 F | 23.0 F | 61% | SSE | 11.5 mph | - | Mostly Cloudy |
| 8:29 AM | 35.6 F | 24.8 F | 65% | SSE | 13.8 mph | 19.6 mph | Mostly Cloudy |
| 8:46 AM | 37.4 F | 24.8 F | 60% | South | 9.2 mph | 16.1 mph | Scattered Clouds |
| 8:53 AM | 37.9 F | 24.1 F | 57% | South | 12.7 mph | 17.3 mph | Scattered Clouds |
| 9:25 AM | 39.2 F | 24.8 F | 56% | South | 10.4 mph | 20.7 mph | Mostly Cloudy |
| 9:53 AM | 43.0 F | 24.1 F | 47% | SSE | 10.4 mph | 16.1 mph | Overcast |
| 10:53 AM | 43.0 F | 28.0 F | 56% | SSE | 11.5 mph | - | Mostly Cloudy |
| 11:53 AM | 45.0 F | 34.0 F | 65% | SSE | 15.0 mph | 19.6 mph | Haze |
| CIM XXV - Dec. 5, 2010 | |||||||
| 6:26 AM | 51.8 F | 48.2 F | 88% | Calm | Calm | - | Overcast |
| 6:33 AM | 50.0 F | 48.2 F | 94% | Calm | Calm | - | Overcast |
| 6:45 AM | 48.2 F | 46.4 F | 93% | Calm | Calm | - | Overcast |
| 6:50 AM | 48.2 F | 46.4 F | 93% | Calm | Calm | - | Overcast |
| 6:53 AM | 46.9 F | 46.0 F | 97% | Calm | Calm | - | Overcast |
| 7:00 AM | 48.2 F | 46.4 F | 93% | Calm | Calm | - | Scattered Clouds |
| 7:53 AM | 46.0 F | 45.0 F | 96% | Calm | Calm | - | Scattered Clouds |
| 8:00 AM | 46.4 F | 44.6 F | 93% | North | 3.5 mph | - | Scattered Clouds |
| 8:53 AM | 54.0 F | 51.1 F | 90% | Calm | Calm | - | Clear |
| 1:53 PM | 57.2 F | 53.6 F | 88% | NW | 4.6 mph | - | Haze |
