Washington: Today - Cloudy, rain possible, high in low 60s, low in mid 40s. The chance of rain is 30 percent today and 50 percent tonight. Wind will be from the northeast at from 12 to 20 mph. Wednesday - Rain, high in the upper 50s.

Maryland and Virginia: Today - Rain possible, highs in the 60s lows in the 40s. Wednesday - Rain possible, high in the 50s.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy, with a chance of rain by tonight. Visibility will be more than 5 miles - except lower in rain. Wind will be from the northeast at from 12 to 20 knots. Waves in unprotected waters will be from 1 to 2 feet.

Extended Area Forecast for Thursday through Saturday: Chance of rain on Thursday, fair through the remander of the period. Highs will be from the mid 50s to the low 70s, lows from the upper 30s to near 50.Normal Washington temperatures for the period are a high of 71 and a low of 50.

West Virginia: Today - Partly cloudy, rain possible, highs from the upper 40s to the low 60s, lows from the mid 30s to the mid 40s. Wednesday - Partly cloudy, highs from the low 40s to the low 50s.

The National Weather Forecast for today - Scattered showers and thunderstorms will extend from Tennesses. Alabama and Florida through the Carolinas, the Virginias and Maryland. There will be a charge showers in northern New England. Rain will extend from the Pacific Northwest and most of California across Idaho and Nevada into the Montana Rockies. Elsewhere, partly cloudy or sunny skies will prevail. Except for mild temperatures over most of the Rockies, southwestern and southern Texas, the Gulf Coast and Florida, the nation will have seasonably cool temperatures.

Almanac Data for today: The sun rises 5:18 a.m., sets 6:54 p.m.; moon rises 9:51 p.m., sets 7:19 a.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapollis (3 1/4), Bloody Point Lighthouse (4 1/2), Deals, Md. (4 1/2), Colonial Beach (5 1/2), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/2), Point Lookout (7).

Pollos

Pollen Count: 140 trees (a reading of more than 7 is considered to be uncesirable).

The Council of Governments' Air Quality index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m. period was 41 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 72 degrees at 2:47 p.m. Lowest temperature since midnight, 49 degrees at 5:20 a.m. Excees of temperature since Apr. 1. 65 degrees. Deficiency of temperature since Jan. 1, 198 degrees. Record high temperature for today, 93 degrees in 1960. Record low temperature for today, 32 degrees in 1883. Relative humidity: Maximum, 77 percent at 6 a.m. Minimum, 29 percent at 5 p.m. Deficiency of precipitation since Apr. 1, 1.16 inches. Excess of precipitation since Jan. 1, 2.44 inches. Highest observed wind since 7 a.m. 20 miles per hour from the westnorthwest at 11:53 a.m. Peak gust since 7 a.m., 28 miles per hour from the northwest at 12:58 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)57(COLUMN)60 1 a.m.(COLUMN)56(COLUMN)62 2 a.m.(COLUMN)55(COLUMN)62 3 a.m.(COLUMN)54(COLUMN)66 4 a.m.(COLUMN)54(COLUMN)72 5 a.m.(COLUMN)51(COLUMN)74 6 a.m.(COLUMN)50(COLUMN)77 7 a.m.(COLUMN)54(COLUMN)69 8 a.m.(COLUMN)57(COLUMN)60 9 a.m.(COLUMN)10 a.m.(COLUMN)67 42 11 a.m.(COLUMN)69(COLUMN)36 12 noon(COLUMN)70(COLUMN)35 1 p.m.(COLUMN)70(COLUMN)35 2 p.m.(COLUMN)71(COLUMN)35 3 p.m.(COLUMN)72(COLUMN)33 4 p.m.(COLUMN)72(COLUMN)33 5 p.m.(COLUMN)72(COLUMN)29 6 p.m.(COLUMN)70(COLUMN)30 7 p.m.(COLUMN)67(COLUMN)33(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)76(COLUMN)30 Albuquerque(COLUMN)76(COLUMN)40 Amarillo(COLUMN)73(COLUMN)46 Anchorage(COLUMN)52(COLUMN)38 Asheville(COLUMN)69(COLUMN)35 Atlanta(COLUMN)69(COLUMN)52 Atlantic City(COLUMN)63(COLUMN)46 Austin(COLUMN)80(COLUMN)65 Baltimore(COLUMN)65(COLUMN)44 Billings(COLUMN)54(COLUMN)30 Birmingham(COLUMN)69(COLUMN)52 Bismarck(COLUMN)43(COLUMN)39 Bolse(COLUMN)57(COLUMN)44 Boston(COLUMN)62(COLUMN)47 Brownsville(COLUMN)91(COLUMN)66 Buffalo(COLUMN)56(COLUMN)33 Burlington(COLUMN)52(COLUMN)26 Casper(COLUMN)57(COLUMN)24 Charleston, S.C.(COLUMN)70(COLUMN)62 Charleston, WVa.(COLUMN)67(COLUMN)42 Charlotte(COLUMN)72(COLUMN)51 Cheyenne(COLUMN)56(COLUMN)28 Chicago(COLUMN)61(COLUMN)43 Cincinnati(COLUMN)55(COLUMN)42 Cleveland(COLUMN)55(COLUMN)45 Columbia, S.C.(COLUMN)72(COLUMN)53 Columbus, Oh.(COLUMN)51(COLUMN)40 Dal.-Ft. Worth(COLUMN)80(COLUMN)59 Dayton(COLUMN)50(COLUMN)41 Denuver(COLUMN)66(COLUMN)34 Des Moines(COLUMN)64(COLUMN)43 Detroit(COLUMN)51(COLUMN)39 Duluth(COLUMN)39(COLUMN)38 El Paso(COLUMN)84(COLUMN)55 Fairbanks(COLUMN)49(COLUMN)32 Fargo(COLUMN)43(COLUMN)41 Flagstaff(COLUMN)68(COLUMN)29 Great Falls(COLUMN)58(COLUMN)26 Hartford(COLUMN)66(COLUMN)35 Helena(COLUMN)55(COLUMN)30 Honolulu(COLUMN)83(COLUMN)72 Houston(COLUMN)84(COLUMN)66 Indianapolis(COLUMN)65(COLUMN)45 Jackson, Miss(COLUMN)77(COLUMN)53 Jacksonville(COLUMN)77(COLUMN)60 Juneau(COLUMN)57(COLUMN)37 Kansas City(COLUMN)70(COLUMN)50 Las Vegas(COLUMN)83(COLUMN)55 Little Rock(COLUMN)75(COLUMN)57 Los Angeles(COLUMN)78(COLUMN)51 Louisville(COLUMN)62(COLUMN)42 Memphis(COLUMN)77(COLUMN)55 Miami Beach(COLUMN)77(COLUMN)66 Midland(COLUMN)85(COLUMN)49 Milwaukee(COLUMN)43(COLUMN)37 Mpls-St. Paul(COLUMN)50(COLUMN)44 Nashville(COLUMN)73(COLUMN)45 New Orleans(COLUMN)82(COLUMN)64 New York(COLUMN)67(COLUMN)48 Norfolk(COLUMN)65(COLUMN)52 North Platte(COLUMN)65(COLUMN)33 Oklahoma City 78(COLUMN)50 Omaha(COLUMN)63(COLUMN)43 Orlando(COLUMN)82(COLUMN)68 Philadelphis(COLUMN)63(COLUMN)46 Phoenix(COLUMN)89(COLUMN)56 Pittsburgh(COLUMN)57(COLUMN)48 Portland, Me.(COLUMN)55(COLUMN)31 Portland, Ore.(COLUMN)59(COLUMN)49 Providence(COLUMN)63(COLUMN)41 Raleigh(COLUMN)74(COLUMN)53 Rapid City(COLUMN)59(COLUMN)36 Reno(COLUMN)68(COLUMN)45 Richmond(COLUMN)73(COLUMN)44 St. Louis(COLUMN)73(COLUMN)46 St. Prbg-Tampe(COLUMN)73(COLUMN)70 Salt Lake City(COLUMN)62(COLUMN)41 San Antonio(COLUMN)81(COLUMN)64 San Deigo(COLUMN)73(COLUMN)57 San Francisco(COLUMN)67(COLUMN)54 San Juan(COLUMN)85(COLUMN)74 St. Ste. Marie(COLUMN)53(COLUMN)29 Seattle(COLUMN)58(COLUMN)48 Shreveport(COLUMN)85(COLUMN)54 Sioux Falls(COLUMN)50(COLUMN)38 Spokane(COLUMN)51(COLUMN)37 Syracuse(COLUMN)56(COLUMN)28 Topeka(COLUMN)73(COLUMN)53 Tulsa(COLUMN)78(COLUMN)48 Washington(COLUMN)66(COLUMN)49 Wichita(COLUMN)76(COLUMN)45(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)T. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Amsterdam(COLUMN)haze(COLUMN)1 p.m.(COLUMN)54 Ankara(COLUMN)rain(COLUMN)3 p.m.(COLUMN)50 Athens(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)64 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)57 Berlin(COLUMN)pt.cldy(COLUMN)1 p.m.(COLUMN)63 Birmingham(COLUMN)smoke(COLUMN)1 p.m.(COLUMN)48 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Cairo(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)73 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)63 Copenhagen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)45 Dublin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)52 Geneva(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Lisbon(COLUMN)rain(COLUMN)noon(COLUMN)59 London(COLUMN)haze(COLUMN)1 p.m.(COLUMN)64 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Malta(COLUMN)pt. cvldy(COLUMN)1 p.m.(COLUMN)64 Manila(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)34 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)43 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)91 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)39 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)61 Rome(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)88 Sofia(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)63 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)34 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)61 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)63 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)55(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)90(COLUMN)73 Barbados(COLUMN)fair(COLUMN)84(COLUMN)77 Bermuda(COLUMN)pt. cldy(COLUMN)70(COLUMN)60 Bogota(COLUMN)cloudy(COLUMN)68(COLUMN)50 Calgary(COLUMN)fog(COLUMN)46(COLUMN)32 Culican(COLUMN)haze(COLUMN)95(COLUMN)57 Edmonton(COLUMN)cloudy(COLUMN)52(COLUMN)37 Havana(COLUMN)pt. cldy(COLUMN)90(COLUMN)73 Kingston(COLUMN)fair(COLUMN)90(COLUMN)79 Montego Bay(COLUMN)fair(COLUMN)88(COLUMN)73 Mexico City(COLUMN)fair(COLUMN)82(COLUMN)55 Monterry(COLUMN)fair(COLUMN)97(COLUMN)66 Montreal(COLUMN)clear(COLUMN)54(COLUMN)32 Nassau(COLUMN)fair(COLUMN)79(COLUMN)66Ottawa clear(COLUMN)55(COLUMN)34 Regina(COLUMN)cloudy(COLUMN)46(COLUMN)30 St. Kitts(COLUMN)pt. cldy(COLUMN)88(COLUMN)73 St. Thomas(COLUMN)pt. cldy(COLUMN)87(COLUMN)75 Toronto(COLUMN)pt. cldy(COLUMN)52(COLUMN)30 Vancouver(COLUMN)cloudy(COLUMN)54(COLUMN)31 Veracruz(COLUMN)cloudy(COLUMN)86(COLUMN)77 Winnipes(COLUMN)cloudy(COLUMN)61(COLUMN)32(END TABLE)