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Stock Seasonality for Westamerica Bancorporation (WABC) 1980-2026

Westamerica Bancorporation (WABC) historical monthly and quarterly returns. Dividend-adjusted performance data.

Westamerica Bancorporation (WABC) seasonality heatmap

Returns across monthly, quarterly, and yearly periods. Cell color encodes signed magnitude; the scale auto-fits each table.

2026

Jan+5.7%
Feb+1.1%
Mar+3.0%
Apr+5.1%
May+2.1%
Jun+5.7%
Jul-0.5%
Aug
Sep
Oct
Nov
Dec

2025

Jan-1.3%
Feb+1.6%
Mar-2.9%
Apr-4.3%
May+0.2%
Jun+0.8%
Jul-1.1%
Aug+5.4%
Sep-0.0%
Oct-4.7%
Nov+1.7%
Dec-0.3%

2024

Jan-15.4%
Feb-3.3%
Mar+6.9%
Apr-4.8%
May+5.8%
Jun-0.6%
Jul+11.2%
Aug-3.2%
Sep-4.6%
Oct+4.2%
Nov+12.0%
Dec-8.3%

2023

Jan-5.9%
Feb-0.0%
Mar-19.6%
Apr-8.6%
May-5.6%
Jun+1.2%
Jul+28.4%
Aug-9.7%
Sep-1.8%
Oct+9.2%
Nov+8.4%
Dec+11.2%

2022

Jan+0.6%
Feb+2.9%
Mar+2.0%
Apr-2.6%
May+2.9%
Jun-7.6%
Jul+7.8%
Aug-6.1%
Sep-6.5%
Oct+20.0%
Nov-0.9%
Dec-4.4%

2021

Jan+1.0%
Feb+8.4%
Mar+4.5%
Apr+1.6%
May-1.1%
Jun-7.5%
Jul-3.6%
Aug+2.1%
Sep-0.9%
Oct-0.9%
Nov-2.8%
Dec+7.3%

2020

Jan-5.9%
Feb-8.7%
Mar+1.7%
Apr+7.2%
May-5.8%
Jun-2.6%
Jul+5.8%
Aug+0.8%
Sep-10.7%
Oct-2.9%
Nov+5.3%
Dec+0.3%

2019

Jan+12.5%
Feb+3.2%
Mar-3.9%
Apr+3.9%
May-6.1%
Jun+2.9%
Jul+4.0%
Aug-3.3%
Sep+0.9%
Oct+6.2%
Nov-0.9%
Dec+4.3%

2018

Jan-0.3%
Feb-2.8%
Mar+1.4%
Apr-3.9%
May+3.3%
Jun-1.3%
Jul+6.2%
Aug+7.4%
Sep-6.1%
Oct-3.2%
Nov+9.3%
Dec-11.9%

2017

Jan-9.8%
Feb+2.6%
Mar-3.5%
Apr-1.5%
May-6.1%
Jun+9.2%
Jul-2.4%
Aug-5.1%
Sep+15.5%
Oct-2.2%
Nov+6.9%
Dec-3.7%

2016

Jan-6.6%
Feb+4.0%
Mar+8.3%
Apr+0.0%
May+0.7%
Jun+1.3%
Jul-4.5%
Aug+9.0%
Sep+0.1%
Oct-2.6%
Nov+26.2%
Dec+1.4%

2015

Jan-16.3%
Feb+5.9%
Mar+0.3%
Apr+1.7%
May+5.1%
Jun+10.7%
Jul-2.6%
Aug-7.8%
Sep-1.5%
Oct+0.3%
Nov+10.8%
Dec-4.6%

2014

Jan-11.9%
Feb+1.8%
Mar+7.6%
Apr-6.0%
May-2.9%
Jun+6.8%
Jul-7.8%
Aug+1.1%
Sep-3.8%
Oct+6.9%
Nov-1.5%
Dec+0.9%

2013

Jan+5.2%
Feb-0.3%
Mar+2.3%
Apr-4.3%
May+4.7%
Jun+1.5%
Jul+5.0%
Aug-1.2%
Sep+5.7%
Oct+4.3%
Nov+7.6%
Dec+1.9%

2012

Jan+5.9%
Feb+2.7%
Mar+1.4%
Apr-4.4%
May-1.8%
Jun+5.6%
Jul-2.5%
Aug+2.0%
Sep+1.1%
Oct-6.2%
Nov-2.7%
Dec+0.1%

2011

Jan-9.9%
Feb+3.9%
Mar-0.4%
Apr-1.1%
May-0.2%
Jun-2.1%
Jul-4.7%
Aug-8.9%
Sep-9.6%
Oct+16.9%
Nov+3.3%
Dec-4.4%

2010

Jan+0.4%
Feb-0.6%
Mar+5.0%
Apr+2.6%
May-5.3%
Jun-5.7%
Jul+3.0%
Aug-5.7%
Sep+7.5%
Oct-8.2%
Nov-1.6%
Dec+13.5%

2009

Jan-15.8%
Feb-6.7%
Mar+14.3%
Apr+18.4%
May-3.3%
Jun-4.3%
Jul+6.1%
Aug-1.6%
Sep+1.1%
Oct-7.4%
Nov+11.3%
Dec+4.1%

2008

Jan+11.9%
Feb-4.4%
Mar+11.1%
Apr+11.1%
May-4.5%
Jun-5.2%
Jul-0.5%
Aug-1.6%
Sep+12.4%
Oct+0.2%
Nov-7.1%
Dec-3.8%

2007

Jan-1.7%
Feb-0.7%
Mar-1.9%
Apr-2.8%
May-0.4%
Jun-4.4%
Jul-7.5%
Aug+19.5%
Sep+2.6%
Oct-3.5%
Nov-1.6%
Dec-5.2%

2006

Jan+1.4%
Feb+1.4%
Mar-4.3%
Apr-1.5%
May-4.5%
Jun+0.9%
Jul-1.8%
Aug+0.1%
Sep+5.6%
Oct-1.3%
Nov+0.0%
Dec+2.2%

2005

Jan-11.0%
Feb+0.9%
Mar-0.6%
Apr-3.6%
May+6.2%
Jun+0.3%
Jul+3.7%
Aug-4.1%
Sep-1.1%
Oct+3.2%
Nov+3.1%
Dec-2.9%

2004

Jan-0.4%
Feb+1.6%
Mar+0.6%
Apr-3.1%
May+1.6%
Jun+6.2%
Jul-2.8%
Aug+4.0%
Sep+4.1%
Oct+4.2%
Nov+2.2%
Dec+0.3%

2003

Jan+2.2%
Feb-0.3%
Mar-2.9%
Apr+9.6%
May+3.2%
Jun-3.1%
Jul+3.3%
Aug-0.4%
Sep+0.9%
Oct+13.1%
Nov+5.5%
Dec-5.7%

2002

Jan+1.0%
Feb+3.5%
Mar+3.9%
Apr+3.5%
May+1.0%
Jun-11.9%
Jul+0.3%
Aug+6.8%
Sep-3.5%
Oct+6.1%
Nov-3.3%
Dec-2.2%

2001

Jan-7.6%
Feb-2.2%
Mar-2.4%
Apr-3.1%
May+5.0%
Jun+2.8%
Jul+0.5%
Aug-0.4%
Sep-7.7%
Oct+1.9%
Nov+6.7%
Dec+1.5%

2000

Jan-9.6%
Feb-9.5%
Mar+22.4%
Apr-9.7%
May+14.7%
Jun-8.5%
Jul+6.2%
Aug+10.0%
Sep+10.4%
Oct+7.5%
Nov-4.7%
Dec+26.2%

1999

Jan-4.3%
Feb-4.3%
Mar-5.6%
Apr+6.0%
May+3.5%
Jun+5.6%
Jul-7.8%
Aug-4.7%
Sep-5.3%
Oct+13.9%
Nov-8.2%
Dec-11.2%

1998

Jan-6.8%
Feb+7.8%
Mar-2.2%
Apr-0.7%
May-6.5%
Jun+4.1%
Jul-4.2%
Aug-20.8%
Sep+19.3%
Oct+15.4%
Nov+8.7%
Dec+1.8%

1997

Jan+5.7%
Feb+10.2%
Mar-5.1%
Apr+3.1%
May+4.6%
Jun+11.4%
Jul+4.2%
Aug+3.8%
Sep+6.4%
Oct+1.1%
Nov+3.9%
Dec+11.9%

1996

Jan+3.3%
Feb+1.7%
Mar+4.4%
Apr+1.0%
May+1.6%
Jun+4.1%
Jul-0.5%
Aug-1.9%
Sep+3.6%
Oct+0.9%
Nov+14.2%
Dec-0.3%

1995

Jan+4.7%
Feb+0.9%
Mar+6.3%
Apr+2.3%
May+5.1%
Jun+4.1%
Jul+0.6%
Aug+0.7%
Sep+3.2%
Oct+4.5%
Nov+3.1%
Dec+4.8%

1994

Jan+4.8%
Feb-4.3%
Mar+3.4%
Apr+4.1%
May+0.7%
Jun+4.4%
Jul-2.1%
Aug+6.4%
Sep+5.1%
Oct-4.0%
Nov-4.0%
Dec-2.3%

1993

Jan+5.9%
Feb+0.0%
Mar+15.0%
Apr-9.2%
May+0.6%
Jun+2.2%
Jul-0.5%
Aug-0.8%
Sep+8.0%
Oct-1.5%
Nov-3.6%
Dec+2.2%

1992

Jan-2.3%
Feb+0.0%
Mar+0.0%
Apr+8.9%
May+0.7%
Jun+6.0%
Jul-7.7%
Aug-9.4%
Sep+17.6%
Oct-6.1%
Nov+8.0%
Dec+8.1%

1991

Jan+1.9%
Feb+29.0%
Mar-3.3%
Apr-1.5%
May+0.0%
Jun+2.7%
Jul-1.1%
Aug-5.7%
Sep+4.0%
Oct+2.3%
Nov+1.5%
Dec-1.5%

1990

Jan-8.5%
Feb+0.0%
Mar+0.0%
Apr-1.1%
May+15.4%
Jun-2.9%
Jul+1.0%
Aug-17.6%
Sep-20.2%
Oct-6.1%
Nov+15.1%
Dec-3.7%

1989

Jan+1.0%
Feb+22.2%
Mar-2.0%
Apr-4.8%
May-2.5%
Jun-0.9%
Jul+0.9%
Aug+1.7%
Sep+27.4%
Oct-2.3%
Nov+1.7%
Dec-0.7%

1988

Jan+10.3%
Feb+25.5%
Mar+0.0%
Apr+0.0%
May-8.4%
Jun-1.6%
Jul-3.8%
Aug+4.6%
Sep+9.3%
Oct+2.5%
Nov-3.4%
Dec+3.5%

1987

Jan+15.0%
Feb-9.2%
Mar-8.8%
Apr+6.5%
May-6.7%
Jun-0.7%
Jul+0.0%
Aug-1.1%
Sep-12.1%
Oct-23.0%
Nov-10.9%
Dec-11.0%

1986

Jan+16.7%
Feb+4.5%
Mar+5.0%
Apr+12.3%
May+2.4%
Jun+17.9%
Jul-4.0%
Aug+23.7%
Sep+5.5%
Oct+18.1%
Nov-0.7%
Dec+0.7%

1985

Jan+17.0%
Feb+5.5%
Mar+0.6%
Apr-0.1%
May-1.7%
Jun+3.1%
Jul+4.2%
Aug+3.4%
Sep+9.7%
Oct+17.7%
Nov-1.8%
Dec+1.8%

1984

Jan-1.6%
Feb+0.0%
Mar+4.9%
Apr+5.0%
May-1.5%
Jun-6.4%
Jul+0.0%
Aug-3.2%
Sep+1.7%
Oct+6.5%
Nov+0.0%
Dec+1.9%

1983

Jan-5.1%
Feb+3.6%
Mar-9.0%
Apr+23.6%
May+6.5%
Jun-13.3%
Jul+5.0%
Aug-9.8%
Sep+12.7%
Oct-1.6%
Nov+0.0%
Dec-1.6%

1982

Jan-12.0%
Feb-2.2%
Mar+7.3%
Apr+6.3%
May+24.5%
Jun-21.3%
Jul+4.0%
Aug-7.7%
Sep-2.6%
Oct+22.5%
Nov+0.0%
Dec+3.5%

1981

Jan+4.9%
Feb+3.5%
Mar+4.5%
Apr-6.1%
May-11.1%
Jun+0.0%
Jul-1.7%
Aug+0.0%
Sep-12.7%
Oct+0.0%
Nov+6.0%
Dec-1.9%

1980

Jan
Feb
Mar
Apr+18.9%
May+0.0%
Jun-1.6%
Jul+15.0%
Aug-1.7%
Sep-7.0%
Oct-9.4%
Nov-2.1%
Dec+3.8%

Avg

Jan-0.7%
Feb+2.2%
Mar+1.5%
Apr+1.6%
May+0.8%
Jun+0.2%
Jul+1.1%
Aug-0.7%
Sep+1.8%
Oct+2.4%
Nov+2.6%
Dec+0.6%

Median

Jan+0.0%
Feb+1.2%
Mar+1.0%
Apr+0.0%
May+0.6%
Jun+0.8%
Jul+0.0%
Aug-1.0%
Sep+1.1%
Oct+1.0%
Nov+1.6%
Dec+0.3%

Last 5Y Avg

Jan-3.2%
Feb+0.4%
Mar-2.1%
Apr-3.0%
May+1.1%
Jun-0.1%
Jul+8.6%
Aug-2.3%
Sep-2.8%
Oct+5.6%
Nov+3.7%
Dec+1.1%

Std Dev (σ)

Jan8.5%
Feb7.6%
Mar6.8%
Apr7.2%
May6.3%
Jun6.8%
Jul6.4%
Aug7.9%
Sep9.0%
Oct8.8%
Nov6.9%
Dec6.7%

Consistency (μ/σ)

Jan-0.08
Feb0.29
Mar0.22
Apr0.22
May0.12
Jun0.03
Jul0.17
Aug-0.08
Sep0.20
Oct0.28
Nov0.38
Dec0.09

Win Rate (%)

Jan50%
Feb57%
Mar57%
Apr49%
May53%
Jun53%
Jul48%
Aug41%
Sep59%
Oct57%
Nov54%
Dec54%

Winning / Losing Months

Jan2323
Feb2620
Mar2620
Apr2324
May2522
Jun2522
Jul2224
Aug1927
Sep2719
Oct2620
Nov2521
Dec2521

Longest Win / Loss Streak

Jan55
Feb44
Mar56
Apr44
May77
Jun95
Jul44
Aug25
Sep86
Oct113
Nov47
Dec33

Best

Jan+17.0%1985
Feb+29.0%1991
Mar+22.4%2000
Apr+23.6%1983
May+24.5%1982
Jun+17.9%1986
Jul+28.4%2023
Aug+23.7%1986
Sep+27.4%1989
Oct+22.5%1982
Nov+26.2%2016
Dec+26.2%2000

Worst

Jan-16.3%2015
Feb-9.5%2000
Mar-19.6%2023
Apr-9.7%2000
May-11.1%1981
Jun-21.3%1982
Jul-7.8%1999
Aug-20.8%1998
Sep-20.2%1990
Oct-23.0%1987
Nov-10.9%1987
Dec-11.9%2018
−23.0%+29.0%

Frequently asked questions

Data & methodology